Lets say that two drivers are involved in an auto accident, and one is injured.

what correction should be made?

1)chnage Lets to Let's
2)insert a comma after say
3)remove the comma after accident
4)change is to was
5)no correction

im going to say 1

1, Is the answer

There is also no need for a comma after "accident."

The correct answer is 3) remove the comma after accident.

When joining two independent clauses with a coordinating conjunction (in this case, "and"), a comma is not needed unless the clauses are long or complex. Since "two drivers are involved in an auto accident" is a complete clause, and "one is injured" is another complete clause, there is no need for a comma in this sentence.