The writer wants to add a sentence immediately before sentence 3 to connect the evidence and commentary provided in the second paragraph to the overall argument of the passage. Which of the following choices most effectively accomplished this goal?

I believe it’s A.

Explanation: it explains difficulties that astronauts may face and in the following sentence it goes more in depth

A. While NASA astronauts are already experienced with the difficulties humans experience in outer space, these problems would be intensified on long-term missions.

Explanation:

Answer A

Correct. The second paragraph provides evidence of the many harmful effects of long-term space travel on the human body, including loss of “muscle mass and bone density” and disruption of the “natural cycle of wakefulness and sleep.” This sentence would effectively lead into this discussion and establish the role of the second paragraph in the overall argument of the passage.

the correct answer is c. analytical reasoning. it is when you analyze the situation to form conclusions.