Which statement is correct about the tasks that StandaloneAgents perform?(Choose the best answer.)

[answerhappygod]

Which statement is correct about the tasks that StandaloneAgents perform?(Choose the best answer.)

A. They update or modify code to be executed, check security, select database servers, and update log files after execution.
B. They schedule scenarios to be executed, check security, constraints and update log files after execution.
C. They retrieve code from the execution repository and request database servers, operatingsystems, or scripting engines for execution.
D. They schedule code from the execution repository and update log files after execution.