The word which is a preposition is <em />in.
Ms. is a noun, Coring is a noun, showed is a verb, us is a pronoun, her is a determiner/pronoun, inventions is a noun, in is a preposition, our is a determiner/pronoun, science is an adjective, laboratory is a noun.
C. ur welcome of I tried little bro
Parallelism hope this helps if not sorry not sorry
I think new ideas individuals contribute to changes in language....
The answer is A :))))))))))))))))