Which of the following comparisons about UDIMM, RDIMM and LRDIMM is correct? (Multiple choices)

Which of the following comparisons about UDIMM, RDIMM and LRDIMM is correct? (Multiple choices)
A . Compared with RDIMM, LRDIMM reduces the load and power consumption of the memory bus and provides the maximum supported capacity of the memory.
B . UDIHM needs to ensure that the transmission distance between the CPU and each memory particle is equal, so that parallel transmission is effective, and this requires a higher manufacturing process, so UDIMM has lower capacity and frequency.
C . UDIMM, a non-ramped dual in-line memory module, the address and control signals directly reach the DRAM chip on the DIMM without going through the buffer, so it is cheap
D . 0 RDIMM supports Buffered mode and high-performance Registered mode, which is more stable than UDIMM and supports the highest capacity of server memory.

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Answer: BC