The correct interrogative pronoun is "Who" in "Who are you?" because "whom" is used as a relative pronoun and is used to denote a indirect object.
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The detail "...make sure they are not touching each other..." best supports the inference that one bad apple can spoil all the others. As stated in the text, the fruits are stored in the hoard house for future consumption. It is important that one does not contain a bruise since this will also affect the others around it.
<em><u>Answer:</u></em>
b) The comma attempts to join two independent clauses.
<em><u>Explanation:</u></em>
When two ideas come together and either one of them can stand by itself as its own, independent sentence, then the use of the comma is correct:
Comma + a conjunction (and, but, for, nor, yet, or, so)