To find the central idea, a reader should ask what the most important message is.
what the most important relationship is.
what the most important signal word is.
what the most important cause and effect is.

Which sentence uses all its nominative case pronouns correctly? a we live on the same street b them and rachel are good skaters. c the redskins fans in the family are fred and me d have joanne and him played tennis together before?

Which piece of evidence best supports schlossers claim that meatpacking is most dangerous job in the united states

How can you avoid the problem of groupthink? a. by choosing a group leader to direct the group b. by composing the team of only like-minded individuals c. by encouraging all members to voice their opinions d. by keeping quiet when you disagree with another group member's opinion