Rambus DRAM (RDRAM) Chips Are Another Type of DRAM Chips

Multiple Choice

Rambus DRAM (RDRAM) chips are another type of DRAM chips that are much faster than SDRAM chips because which of the following is true?

A) They transfer data twice for each clock cycle.
B) They are synchronized to the system clock.
C) They do not have to be re-energized as often.
D) They use pipelining techniques.