The second civilian astronaut who flew on Apollo 7 was Walter Cunningham
Answer: Option (a)
<u>Explanation:</u>
Apollo 7 mission was proposed in October 1968 and this was the first mission to carry crew(members) to the space.
This mission consists of 3 crew members,
- Commander "Walter M.Schirra" Jr,
- Command module pilot " Donn F. Eisele"
- "Walter Cunningham" as lunar module pilot.
Lunar module pilot was the sole survivor in that mission. Apollo 7 mission lasted for nearly 21 months and it fulfills the drawback of Apollo 1 mission.
C: it led to the withdrawal of many members in the North.
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</span><span>C. the construction and use of trenches</span>
