'Before they ate a snack' is the correct answer, it is the adverbial clause of time. A cannot be correct because that is an independent clause, and adverb clause has to be dependent. B isn't a clause at all.
Hyphen's will be used when a word is hyphenated. Hyphens join words together, while dashes separate them.
Most likely C, but could be B
Answer: C) Income potential
Explanation: This is not a benefit for exercising
