<span>An adverb
clause is a group of words that works as an adverb (which answers the questions
when?, where?, why?, how?, how much? and under what condition?) and can modify verbs,
adverbs and adjectives.</span>
<span>
So the correct answer is "who received a good grade".</span>
The answer is d unless you messed up typing
This feature article is about saving water by using natural gas instead of coal.
<span>B) The text structure is problem and solution; the words safest and causing indicate this.</span>
