Answer:
Each volunteer and staff member need to arrive at the scheduled time.
Explanation:
The adjective each is used before a <u>singular</u> countable noun and, therefore, the verb should be in <u>singular</u> form, too.
So the sentence should be written as "Each volunteer and staff member needs to arrive at the scheduled time."
1. C , 2. B, 3. A. I think those r correct
I'm pretty sure it is c. provoke further though because the speaker is asking the audience further questions to keep them thinking about why he is correct (i.e. why you should groom your dog yourself and not take him/her to the groomers).
Hope this helps! :)