Help me please is a quizz

i will go with b

Explanation:

Because it says 20 people at one time so it means it would been working quickly |

hope this helped.

quicky

Explanation:

if it can do the work of 20 people at a time it does it faster and it is less time consuming in general and workers taske longer

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."