1. What is the main idea of this
paragraph?
A. According to recent research,
humans are unable to survive
on other planets.
B. According to recent research,
only the Moon and Mars are
inhabitable by humans.
C. Humans are interested in
colonizing Mars, since the
Moon's environment is too
harsh.
D. Humans are interested in
amor colonizing the Moon and
200
Mars, but their environments
om
are challenging. common lit