Which answer is a correctly punctuated compound sentence?

A. Mrs. Anderson flies to Sweden tomorrow her plane leaves at 2:00 P. M.

B. Mrs. Anderson flies to Sweden tomorrow, her plane leaves at 2:00 P. M.

C. Mrs. Anderson flies to Sweden tomorrow, and her plane leaves at 2:00 P. M.

Hello! Gramatically, let's look at each choice-

(a) says: Mrs. Anderson flies to Sweden tomorrow her plane leaves at 2:00 P. M.

This can't be right, because it's a run-on sentence! If someone were to say this outloud, it would sound as if someone wasn't "taking their time"!

(b) says: Mrs. Anderson flies to Sweden tomorrow, her plane leaves at 2:00 P. M.

This one looks correct. It has a comma which adds a pause. It also connects both statements made in the sentence.

(c) says: Mrs. Anderson flies to sweden tomorrow, and her plane leaves at 2:00 P. M.

This one wouldn't be correct because its listing ideas with "and" in between. It's as if the speaker is saying "she does this and this and that and that ... "

So your best choice would be B.