The answer is C. A dependent part of a sentence with a subject and a verb.
I think its " Endless "
Explanation:
Explanations are hard with questions like context but Ill try my best.
Endless is a close enough synonym for Immeasurable, since both words describe something that's either out of reach or never-ending
Im sorry if Im wrong.
There is no such thing as Juntion.
Its Conjunction. Subordinating conjunctions. Subordinating conjunctions are conjunctions that are used at the beginning of subordinate clauses. Some examples of these conjunctions are; although, after, before, because, how, if, once, since, so that, until, unless, when etc.
The answer would be Cosmo should stick to his original research question and ignore the new information, which will only distract him from his focus
<em>A/N: hope this helped you ;-;</em>