What is the implementation principle of linked clone iCache?

What is the implementation principle of linked clone iCache?
A . The virtual machine running acceleration is achieved by caching the hotspot data of the linked clone parent volume into the host’s memory cache.
B . Reduce read IOPS pressure on the parent volume storage itself
C . When requesting to read data, first read it in the memory cache. If it is not read in the memory cache, it will return to the storage to read the data.
D . Effectively increase the startup speed of linked clone virtual machines

Answer: A