What is the main difference between correlated and pooled data?

A.
Correlated data all comes from the same row of the table, while pooled data uses a different line
for each request.

B.
A separate copy of correlated data is owned by each test agent, while pooled data is shared across
all agents.

C.
Correlated data is varied at runtime, while pooled data is varied at record time.

D.
Correlated data is varied by the server, while pooled data is varied by the client.