When the HOA switch is in the AUTO position at 8 am, which components are energized?

The correct choice indicates that when the HOA (Hand-Off-Automatic) switch is in the AUTO position at 8 am, both the TC motor and the transformer are energized. This suggests a specific configuration where the AUTO position allows for the automation of the control system involved, which typically includes activation of the motor responsible for the main operational function (in this case, the TC motor) as well as the transformer, which is likely required to power other components in the system or step down/up voltages as necessary.

In this scenario, the transformer plays a crucial role in ensuring that the electrical supply is in the proper form and voltage to operate effectively. The operation of the TC motor would depend on receiving the correct power from the transformer, thereby emphasizing the relationship between both components when the system is set to AUTO.

The other options include additional components such as lights or relays. However, the inclusion of these elements may indicate a more complex operation that is not specified or implied simply by the AUTO setting and time context in the question. Therefore, focusing solely on the TC motor and transformer aligns with a more straightforward interpretation of the system's operation at that moment in time.