in your database instance， the STATISTICS_LEVEL initialization parameter is set to BASIC.  What is the impactof this setting（）

AOptimizer statistics are collected automatically.

BOnly timed operating system （OS） statistics and plan execution statistics are collected.

CThe snapshots for the Automatic Workload Repository （AWR） are not generated automatically.

DSnapshots cannot be collected manually by using the DBMS_WORKLOAD_REPOSITORY package.

EThe Oracle server dynamically generates the necessary statistics on tables as part of query optimization.