Answer:
Seeing the rainbow really lifted Sienna's mood.
Explanation:
The answer is D because the proper sentence would be; With a squeal and a giggle, the wave came in, and the boy GOT soaked. Became soaked, would mean that he got soaked in the PAST tense, and he just randomly became soaked. So yes, as you assumed, the answer is D
I would choose letter C because plots are used in writing a story, but nonfiction papers are more informational and focus on a specific topic. They do not go through events like stories do.