I’m pretty sure it’s C. I know some teachers make you write an explanation so you could say that it combines both sentences and still keeps the details! I hope this helps!
C.) During the Renaissance, a period after the Middle Ages, several important inventions changed society.
Explanation:
This sentence combines both sentences in a concise manner while keeping the details and adding a natural flow to the reading. One way in which this sentence achieves this is by turning information from sentence B to an appositive phrase, which is a type of phrase that describes, renames or gives further information of another noun placed right beside it, in this case, that noun is “the Renaissance.”
