Which of the following is neither an advantage nor a disadvantage of serializing memory requests at the home node?
a. It prevents overlapping processing of memory requests that could lead to inconsistent results.
b. It allows a processor to read from a block that is supposed to have been invalidated.
c. It leads to poorer performance when multiple requests for the same block arrive at nearly the same time.
d. It requires delaying a read request until a previous write has "fully propagated."
