Answer:
Grunkle Stan Pines baked a cake but forgot to add sugar; therefore, he took one bite and spit it out.
OR
Grunkle Stan Pines baked a cake but forgot to add sugar. Therefore, he took one bite and spit it out.
Explanation:
What is "Grinkle Stan Pines" ??
"Therefore" is not the appropriate word here, but your instructions say to correct only capitalization and punctuation errors.
First is A) Imagery sets moods for stories
Second I assume is D) Fast and slow because it's an "exciting" text, but the dashes cause for a pause, almost like a comma or if to say "take a breath".
I think the answer to this question is the theme. So, D. I hope I helped you! I'm sorry if I am wrong