<span>C. old : ancient :: crowded : jam-packed - This is the analogy that compares degree of intensity.
The term that means extremely or very very old is ANCIENT.
The term that means extremely crowded or very very crowded is JAM-PACKED.
Other analogies that compares degree of intensity are cold: freezing or lukewarm : boiling.
They all have the same meaning but differ in intensity.</span>
<span>subordinate clause: as if they had been total
strangers.
clause type: adverb clause
</span>
<span />
<span>It’s a good rule of thumb to keep an eye out for
subordinating conjunctions when looking for subordinating clauses because of
how subordinating conjunctions (such as “as”) will begin a subordinate clause. Then, when trying to decide whether the clause
is an adverb clause or an adjective clause, a good question to ask yourself is “What
is this describing?” For instance, what
is “as if they had been total strangers” describing? The answer is the way they boarded. And, “boarded” is an verb; thus, because the
clause is adding to the verb, the clause is an adverb clause. </span>
Process analysis (“how to”), I guess the answer is 'd'.But in case you need some professional help, contact Supreme essay service. Those guys are real professionals in what they do. Good luck!