Question

Which is the correct way to punctuate the following sentence?

Answer 1

A is a run-on sentence, therefore it is incorrect.
B (leave as is) in incorrect because the original sentence combines independent and dependent clauses with a semicolon; semicolons are used to combine independent clauses.
C is incorrect for the same reason B is incorrect (the first clause in dependent).
D is the correct answer, as it properly uses commas to combine the clauses.

Hope this helps.