Question

it took the astronauts a few weeks to get used to the conditions in outer space. in time, they adjusted to the frequent changes in sunlight and the effects of zero gravity. what did the astronauts do? the astronauts determined the conditions in outer space. the astronauts simulated the conditions in outer space. the astronauts monitored the conditions in outer space. the astronauts adapted to the conditions in outer space.

Explanation:

The text states that astronauts took a few weeks to get used to outer - space conditions and adjusted to sunlight changes and zero - gravity effects. "Get used to" and "adjusted to" mean they adapted.

Answer:

The astronauts adapted to the conditions in outer space.