日常安全用电包括（）。

A、人走关灯

B、每天下班拔掉计算机电源插头

C、功率型用电设备要随时有人看守

D、上班过程中只要不用电就关掉电源

We're trying to ring you back, Bryan, but we think we _____ your number incorrectly.[ ]

A. looked up

B. took down

C. worked our

D. brought about