Paragraph Completion

.......................................... However, it is yet known where the astronauts will land. On the other hand, it has already been decided that the best place for a permanent human settlement would be in the northern hemisphere. The southern hemisphere of the planet has far colder winters with extreme conditions that would make living on Mars extremely difficult.

A- NASA's 2030 manned mission to Mars is not the only proposal to send humans to the Red Planet.

B- NASA is planning to have a manned mission to Mars in the 2030's

C- It seems like NASA still has lots of work to do before it can launch its manned mission to Mars.

D- Establishing a human colony on Mars has long been the dream of NASA

E- It will be more than a decade before NASA's Mars mission takes place.

Which is correct? I said D