Q: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
[header] How to use a router as a switch [title] Plug the router into an open power outlet. [step] Plug the router you want to turn into a switch (we'll call this the' switch-router' from now on) into an open power outlet. You should see the power light indicator light up. <sep> (A) This should be located on the back of the router's circuit breaker (just beneath the switch). [title] Turn on the switch and wait for the power to be turned on. (B) [substeps] If your router does not have a circuit breaker, this indicator may only turn off. You can find the light button at the bottom of the router's housing. (C) This indicates that the switch-router is receiving voltage and the router is receiving electricity. [substeps] If the router is not receiving voltage, have the switch-router switch off immediately. (D) [title] Hold the reset button on the switch-router for 30 seconds. [step] Look for a small button labeled " reset " and hold it for 30 seconds until all the lights blink off for a few seconds.
A:
D