Read the following sentences. Sentence 1: In 2007 501 students scored exceptionally high.
Sentence 2: Ginny asked, "Did you buy a Maytag washer?"
Sentence 3: She asked if we had any more buckets.
Sentence 4: They stripped the beds, washed the sheets, and remade the beds.
Which of the following correctly states which sentence needs more punctuation?

Sentence 1 needs a comma to avoid misreading.
Sentence 2 needs single quotes around the brand name of Maytag.
Sentence 3 needs quotation marks.
Sentence 4 needs semi-colons.