D: the National Aeronautics and Space Administration (NASA)
Explanation:
NASA played the most role in pushing for the raise of the flag which was later raised by NASA's Neil Armstrong.
Answer:
A. gerund
Explanation:
The phrase in the question is a gerund phrase.
Gerund phrases are marked by verbs with the "ing" ending, and in general terms, they represent an action in course.
The pharse in the question starts with "By singing the song...", thus, it is a gerund phrase.
A. because preposition has a pronoun or noun with a word relating another noun or pronoun
the answer is the first one
and i am sorry if it is wrong