Final answer:
The NEC section 314.23 requires that the conduit body be supported adequately by the Rigid Metal Conduit (RMC) or according to other specifications in the Code. Thus, for the given description, the answer is 'a. requires.'
Step-by-step explanation:
The student's question pertains to the National Electrical Code (NEC) and how it applies to the support of a conduit body connected to Rigid Metal Conduit (RMC). Specifically, it deals with the code requirements of section 314.23 in the NEC regarding the support system for conduit bodies. According to the NEC, section 314.23 would require that a conduit body be adequately supported by the RMC or by other means as specified by the Code. This means that the conduit body, being threaded into the RMC which comes out of the ground, needs to have appropriate support to ensure safety and code compliance. So the answer to the question is 'a. requires.' The RMC, having sufficient strength and being threaded into the conduit body, can provide that support unless the installation doesn't follow the requirements stated elsewhere in the NEC, implying that a different support method is necessary.