Answer:
B. Sammy's assertive attitude leads to his popularity
Step-by-step explanation:
In the last paragraph, the author says that, "Jermaine decided Sammy would appear publicly and perform in videos because he choreographed the dance in the original video." This shows that Sammy positively wanted the video to be popular and worked hard for it, and that is why "Sammy was traveling all over the country, filming videos, appearing at shopping malls, and performing on music television channels." Therefore, the correct answer is "Sammy's assertive attitude leads to his popularity."