How to change french sentences from singular to plural?

Which of the following statement about groups is likely false? a.)you can be part of one and not know it. b.)interdependence can lead to frustration. c.)there is usually a common purpose. d.)structure tends to exist within them.

Which of the following cultures influenced rome with their tales of the trojan war? a. bithynia b. aegyptus c. graecia d. helvetica

Hich statement about this letter is true? the request is not reasonable. the sender’s address and the date are missing. the writer includes all of the needed information. this request will receive a fast response.