Respuesta :
According to the sentence, the Gemini program valuable to future space programs include option D: Gemini astronauts worked to perfect methods of re-entry and landing.
What is the space program about?
A space program is generally defined as the technological program that is used to explore outer space.
Gemini program was carried out during the year 1965 to 1966 to shape up the future space programs and send the first man to moon successfully in due course. The program was conducted by NASA.
Therefore, correct option is D.
Learn more about space programs, refer to the link:
https://brainly.com/question/10942092
Answer:
D: Gemini astronauts worked to perfect methods of re-entry and landing.
Explanation:
got it right on edge!