Which sentence contains an error in subject-verb agreement?

Question

Elke or Carina is going to be the new dance squad captain.

Some of her friends and family members are coming over for dinner.

July and August are the warmest months of the year.

Each volunteer and staff member need to arrive at the scheduled time.

Answer 1

The sentence with an error in subject-verb agreement is:

"Each volunteer and staff member need to arrive at the scheduled time."

The correct version should be:

"Each volunteer and staff member needs to arrive at the scheduled time."

The subject "Each" is singular, so the verb should also be singular ("needs").