Given a system-period temporal table POLICY_INFO with its associated history table
HIST_POLICY_INFO, which statement is true?

A.
When querying with no time period specification, only the HIST_POLICY_INFO table is
queried.

B.
When querying with a time period specification, both the POLICY_INFO and
HIST_POLICY_INFO tables are potentially queried.

C.
When querying with a time period specification, only the HIST_POLICY_INFO table is
queried.

D.
When querying with no time period specification, both the POLICY_INFO and
HIST_POLICY_INFO tables are potentially queried.

Explanation: