I am not sure but i think option A is correct. I googled the definition of direct supervision at uslegal.com and found imp information.
Link is :
Direct Supervision Law & Legal Definition
Direct supervision generally means to be physically present, or within an
immediate distance, such as on the same floor, and available to respond to the needs of something or someone. Precise definitions vary by context and governing entity. For eaxample, in the context of employment law, it may involve defining the degree of control over a worker's tasks. Direct supervision on a job may be defined by the degree of supervision by a person overseeing the work of other persons, by which the supervisor has control over and professional knowledge of the work being done.
The following is an example of a state law dealing with occupational therapy:
671-2-.03 Direct Supervision Defined.
Direct Supervision as used in the Law shall mean daily on-site, close contact whereby the supervisor is able to respond quickly to the needs of the client or supervisee.
still, I am confused... thanks for your all help