Which of the following sentences is punctuated correctly?

Question

Quizplus · Accepted Answer

When starting a sentence with a dependent clause, use a comma after it.
When decorating cookies, be very careful the icing doesn't harden too quickly. is grammatically correct. When starting a sentence with a dependent clause (a string of words that cannot be a complete sentence on its own) you need to put a comma directly after it.
When decorating cookies: be very careful the icing doesn't harden too quickly. is grammatically incorrect. When starting a sentence with a dependent clause (a string of words that cannot be a complete sentence on its own) you need to put a comma directly after it. In this sentence, there is a colon where a comma should be. A colon is normally used to introduce a list or to connect two closely related independent clauses.
When decorating, cookies, be very careful the icing doesn't harden too quickly. is grammatically incorrect. When starting a sentence with a dependent clause (a string of words that cannot be a complete sentence on its own) you need to put a comma directly after it. In this sentence, there is an extra comma after "decorating" that should not be there. If this comma was removed, the sentence would be grammatically correct.
When decorating cookies, be very careful, the icing doesn't harden too quickly. is grammatically incorrect. When starting a sentence with a dependent clause (a string of words that cannot be a complete sentence on its own) you need to put a comma directly after it. In this sentence, there is an extra comma after "careful" which splits up the independent clause. This comma does not belong. If it were to be removed, the sentence would be grammatically correct.

Which of the Following Sentences Is Punctuated Correctly