read the paragraph, then choose the word that best completes the sentence.\npeople have been traveling into…

read the paragraph, then choose the word that best completes the sentence.\npeople have been traveling into space for decades. so far, however, they have stayed pretty close to earth. in may 2011, nasa announced that it had built an ideal spacecraft for a mission that could take astronauts to distant locations never before visited by humankind. it is the orion capsule, a vehicle the agency has been developing for years. nasa officials hope that with some additional research and engineering, the orion spacecraft will permit a manned trip to mars. each 23 - ton (21 - metric - ton) capsule would take four astronauts on a 21 - day trip.\nnasa hopes to ______ their missions.\na acknowledge\nb supervise\nc withdraw\nd expand

read the paragraph, then choose the word that best completes the sentence.\npeople have been traveling into space for decades. so far, however, they have stayed pretty close to earth. in may 2011, nasa announced that it had built an ideal spacecraft for a mission that could take astronauts to distant locations never before visited by humankind. it is the orion capsule, a vehicle the agency has been developing for years. nasa officials hope that with some additional research and engineering, the orion spacecraft will permit a manned trip to mars. each 23 - ton (21 - metric - ton) capsule would take four astronauts on a 21 - day trip.\nnasa hopes to ______ their missions.\na acknowledge\nb supervise\nc withdraw\nd expand

Answer

Brief Explanations:

The paragraph mentions NASA building a spacecraft for distant locations and hopes for a manned trip to Mars. This implies an intention to grow or extend their missions. "Expand" means to make larger or more extensive, which fits the context. "Acknowledge" means to recognize, "supervise" means to oversee, and "withdraw" means to pull back, none of which fit as well.

Answer:

D. expand