Sosuke is from japan and has decided to give his informative speech on japanese marriage customs. because he will be getting married back home the next summer, he is very excited about the topic. he is concerned, however, that his classmates, all of whom are from the united states, may think he is saying that marriage traditions in japan are better than those in the united states. sosuke’s concern indicates that he is sensitive to the problem of

cultural differences

Explanation:His classmates are from America and when he get excited about marriage customs in Japan, He is somehow also concerned about his friends from America which we know the culture is not the same between these countries and of course these differences may cause conflicts . It is very likely that while one enjoys his cultural activities but must also be mindful of the differences as we see Sosuke being worried in the article.

i think the answer is either c or d

im thinking d might make more sense though

sorry if im wrong