Answer:
Noun. reflex (plural reflexes) An automatic response to a simple stimulus which does not require mental processing. (linguistics) The descendant of an earlier language element, such as a word or phoneme, in a daughter language.
The correct answer is becoming an astronomy researcher
For starters, it is the only appositive phrase. It is also non-essential because the sentence conveys full meaning even if it was removed.
I would say D!
The students are struggling and without motivation they’d probably struggle more!
It's B. The dashes separate a mild afterthought.