stranger things

Which of the following is not a complete sentence A: Assembling the bookcase, as my father mentioned. B: While assembling the bookcase, my father fell asleep. C: My father assembled the new bookcase in one day. D: My father has assembled the bookcase.

jus took the quiz so here's the answers it says are right 1. the central plains of north America.. 2. system of causeways.. 3. pull ashore to get supplies.. 4. to work together and defend each other.. 5. they taught settlers.. 6. he went in search.. & Spa...