Question

When combining two independent clauses, a comma must be placed where

Answer 1

Place it at the end of the first clause, just before the conjunction.

Answer 2

thank you, can you help me on this one too? A comma should not be used to __________.

separate compound elements
set apart an introductory phrase
separate narration from quotations
set apart introductory words or interjections

Answer 3

a seems wrong, The others are uses of commas.