Let's start first by using process of elimination. Usually, when given multiple choice, we can eliminate two answers right away. In this case, I would eliminate A and D, because those answers make no sense and appear far-fetched.
Now let's move on to B and C. Obviously both of these answers have bearing, however, our job is to chose the best answer. According to Google, the Star Trek effect is the cultural influence Star Trek has on the nation, for example, promoting interracial kissing and a diverse cast. Therefore, my best guess would be C, because it is a cultural aspect.
If my answer was correct, please let me know, and give me brainliest answer!