The following command is executed to create the baseline template： SQL> EXECUTEDBMS_WORKLOAD_REPOSITORY.CREATE_BASELINE_TEMPLATE（START_TIME=> TO_TIESTAMP（SYSDATE+2）， END_TIME=>TO_TIMESTAMP（SYSDATE+10）， BASELINE_NAME=>’Mybase4’， TEMPLATE_NAME=>’Mytemp4’， EXPIRATION=>NULL）； Which statement is true about the effect of the above command？（）

A. It creates a baseline template that never expires.
B. It produces an error because no snapshot information is provided to create the baseline.
C. It creates a baseline template that expires after the Automatic Workload Repository （AWR） retention period.
D. It creates a repeating baseline template that repeats after the Automatic Workload Repository （AWR） retention period.