<u>H</u><u>O</u><u>P</u><u>E</u><u> </u><u>I</u><u>T</u><u>S</u><u> </u><u>H</u><u>E</u><u>L</u><u>P</u><u>F</u><u>U</u><u>L</u><u> </u>^_^
CARRY ON LEARNING
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•RHONA</h2>
One of the many technological advances today is an Iphone. We all use phones everyday and now almost everyone has an Iphone or some type of smart phone. With these phones we are able to fear him anything we want at any time, call or text at any time, and many other things. These are just extremely useful because it is something you take everywhere.
The answer is B. "which had been slowed by the accident" is extra information that the sentence doesn't need so you put a comma before and after "which had been slowed by the accident"
A adjective clause is a is a dependent clause used as an adjective. Most of the time it begins with pronoun for a example which.
So it would most be essential when your "looking at a sentence that starts with a pronoun (most likely in a short story) and it sounds more of a question. It would also be a dependent clause and would function as an adjective as in <span>answering questions</span> for example: Which one?"
Hope this helps!