Which of the following speeds BEST represents the speed of the memory when installing 1 GB DDR2 at 800 Hz and 1 GB DDR2 at 600 Hz?

Which of the following speeds BEST represents the speed of the memory when installing 1 GB DDR2 at 800 Hz and 1 GB DDR2 at 600 Hz?

A.
600 Hz

B.
700 Hz

C.
800 Hz

D.
1400 Hz