ImO the poll should be multiple choice because there are more options than one that seem selectable.
* Black men have slightly larger dicks on average
No scientific studies about penis size that i know made a classification based on skin color, geographic origin or genetic heritage so we will probably never know. There was a survey in the U.S. based on self-assessed data/measurements that showed a slightly bigger outcome for Black men then their white "counterparts" but the difference was not more than half an inch of length. Less was said about girth, unfortunately.
my conclusion: i tend to believe that there is not much of a difference. And if there is, it is merely statistical.
* Doesn't make any difference
It truly doesn't make any difference for female mating patterns.
A Woman seeking sex / a "one night stand" with a man typically makes her decision for a suitable choice before she has even seen the person of interest's genitals. Once the decision is made and it develops into moving further and becoming intimate the progression pretty much depends on the dynamic and the man's skills to seduce and please more than a singular body feature like the size of his penis.
For a "full-blown" relationship there are not only many more factors but also more relevant factors than the size of a man's genitals as a basis for a Woman's mating decision.
The only situation where it may make a difference is a Woman's decision for a "friends with benefits" relationship with no strings attached.
my conclusion: Penis size may make a difference when it comes to a Woman's mating decision but for the most part this is restricted to a certain type of relationship with no general relevance. So i would say it "Doesn't make
much difference" instead.
* White men have bigger dicks
It may be contradictory to what many people - especially in these forums - believe but i think it is actually true when we are not talking about average size but the subgroup of men with huge penises (above ten inches length). When we look into data based on different countries we will find that countries with a predominant Black population have a smaller ratio of men with penises at the extreme ends of the size spectrum while countries with a predominant white population give a more diverse picture. Having that said, it is more likely to find men with both tiny and huge penises within a group of white men while the majority of Black men seem to be closer to "their" average of about 6.5 inches.
my conclusion: more white men have bigger dicks (and smaller dicks!) as compared to Black men, so the statement "White men have bigger dicks" seems to be valid.
To sum it up, option one and three of the poll seem to be correct, option two a "somewhat correct" statement. The only statement that seems false
in my opinion is option four - the one which has been voted for by the greatest number of members so far.