Which of the following sentences is correctly punctuated?
a. Mary remembered to buy milk didn't she?
b. The local police asked the F.B.I. to assist with the case.
c. Mr. Jones visited the YMCA before becoming a member.
d. The company held it's annual party at the convention center.

How is a compound sentence formed?
a. By joining a simple sentence with a dependent clause
b. By joining two independent clauses and one dependent clause
c. By joining two simple ...