Can: I heard that Mars is the only planet we can send humans to.
Ayşe: Maybe, but it has a thin atmosphere.
Can: Yes, and its gravity is about 38% of Earth's.
Ayşe: So if you weigh 50 kg on Earth, how much would you weigh on Mars?
Can: That's 19 kg. But your mass doesn't change.
Ayşe: Good point.
According to the conversation, which of the following is INCORRECT?
A)Mars has a thin atmosphere.
B)Gravity on Mars is less than on Earth.
C)A person's mass changes on different planets.
D)Ayşe learns about the weight on Mars.