PLEASE HELP I AM DESPERATE

if a and b are your only choices, your answer is a.

Explanation:

the second choice doesnt say much, or give you a lead to find out the writer's purpose. it merely just states that someone had a key. the first choice includes the word mystery, and a further explanation of thought. That gives you a lead.

the president was the speaker and it was a great part of history.

explanation:

video of the national aeronautic space administration's (nasa) coverage of president john f. kennedy’s address at rice university, houston, texas, concerning the nation's efforts in space exploration. in his speech the president discusses the necessity for the united states to become an international leader in space exploration and famously states, "we choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard."