Which of the following is NOT in accordance with Mr. Drengenbergs suggestion？A．Never use o

Which of the following is NOT in accordance with Mr. Drengenbergs suggestion？

A．Never use outdoor lights that are certified for indoor use.

B．Put exactly 50 screw-in type bulbs to each outlet.

C．Take off the outdoor lights after the Christmas season is over.

D．Avoid metal nails or staples when putting on the outdoor lights.

请帮忙给出正确答案和分析，谢谢！