which of the following is true?

To run Gaia in 64bit mode, which of the following is true?
1) Run set edition default 64-bit.
2) Install more than 4 GB RAM.
3) Install more than 4 TB of Hard Disk.

A.
1 and 3

B.
2 and 3

C.
1, 2, and 3

D.
1 and 2