C
A can’t be right because rockets are needed to send space probes and rovers
B is too detailed, and is too narrowed down
D is also just a small factor of the big picture
Space probes and rovers are best known for being able to voyage to places that humans can’t go, due to environment and cost
A landslide moves a lot of the earth down a slope at one time
An area of land separated by natural borders.
The capital of denmark is copenhagen :)
