Which sentence from the selection explains the historical context of why Katherine Johnson was a pioneer at NASA?

i am sure the answer is d

the answer is c have a good day

the correct answer is d

a conference committee is a group of congress representatives appointed by the senate and the house to reach an agreement over a bill that had different versions in each chamber. this is due to the fact that, to pass a law. both the house and the senate must agree on the exact same content and wording of the bill to present it to the president.