Answer:
D) Due to the earlier malfunction, the aviation mechanic double-checked the writes.
Step-by-step explanation:
The other sentences are punctuated incorrectly. They should read as follows.
A) After we ate lunch, we went to a movie, ate popcorn, and did some shopping.
We needed to add a comma after the introductary phrase and as part of the list.
B) During the long intermission of the play everyone chatted about the first act.
The comma is not necessary.
C) Dad cooked a fancy and delicious dinner and I set the table with our best dishes.
The commas are not necessary since "and" is used. If "and" was removed, we could put a comma between fancy and delicious.