How do know if you're using the correct plural

Which of the following words does not contain the prefix fore-? forensic forearm foreshadowing

Which statement state a claim? check all that apply. (1) the driver education programs are often to sophomore’s at local high schools. (2) students should have a vision test before they can operate motor vehicles. (3) driving classes should i head instruction about the dangers of texting and driving. (4) mr. graber is the behind-the-wheel instructor at our high school. (5) behind-the-wheel courses ought to include driving time on local highways.

According to the study what did john steinbeck do to prepare for his book the grapes of wrath