A number of States have adopted no-fault auto insurance, but what is it exactly?

what correction should be made?

1)chnage States to states
2)change have to has
3)change have adopted to adopted
4)remove the comma after insurance
5)change what to which

i think its 3 but not sure

No, it's 1. There is no need to capitalize the S on "states" in this sentence.

thank you and sorry i keep changing my name i just feel stupid for not being able to answer these questions.

Just be yourself! And these may be easy for me; I've taught English since the mid-1960s. As long as you're learning, so you get more right than wrong, you're doing fine.

To determine the correct answer, let's first examine the sentence: "A number of States have adopted no-fault auto insurance, but what is it exactly?"

The sentence structure seems grammatically correct, but we need to identify any mistakes or suggested corrections.

1) Change "States" to "states": This correction is not necessary. The word "states" can be capitalized if referring to specific states in a country, such as the United States.

2) Change "have" to "has": The verb "have" is the correct form since it agrees with the subject "a number of states." The subject is plural, so the plural form of the verb "have" is appropriate.

3) Change "have adopted" to "adopted": This is the correct correction. By changing "have adopted" to "adopted," the sentence becomes grammatically correct, as it now presents the past tense.

4) Remove the comma after "insurance": The comma is correctly placed in this sentence. It separates the main clause "A number of States have adopted no-fault auto insurance" from the subordinate clause "but what is it exactly?"

5) Change "what" to "which": This correction is not necessary. The word "what" is used correctly in the sentence to introduce a question.

Therefore, the correct answer is option 3) Change "have adopted" to "adopted".