The answer is b because the tone is almost as excitement and hints thing in the future
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.
Im not sure how to wxplain it very well but who do you like the most who do you admire the most from your family.
For example: i admire my mother becouse she is strong, has confidence, is kind, helpful,and also is a great influence!
The anwser yo this question is A