Hi Alexandra —
I think (B) is an answer that would need to be true for those who believe that horoscopes completely determine personality, but in this case, we are evaluating the psychologist’s point —
His point is that horoscopes do not completely determine personality.
In order for his point to be true, it does not depend on the statement “personality differences cannot be explained by cultural differences” —
If anything, being explainable by cultural differences would help support his point that it isn’t just horoscope that determines everything.
Easy q to get turned around on — hth clear things up —