Which Apex class contains methods to return the amount of resources that have been used...

TheLimitsclass in Apex provides methods to check the consumption of governor limits, such as the number of SOQL queries, DML statements, and heap size used.

Example:

Integer dmlStatements = Limits.getDMLStatements();

Integer dmlLimit = Limits.getLimitDMLStatements();

Not Suitable:

Option A:OrgLimitsis not an Apex class.

Option C:Messagingdeals with email and messaging operations.

Option D:Exceptionis for handling exceptions, not tracking resource usage.

Limits Class