According to the author, Mackintosh decided to enter the competition because ______.A．not

According to the author, Mackintosh decided to enter the competition because ______.

A．not many drawings had to be submitted

B．no designs were required for furniture

C．there was no need to worry about cost

D．he had designed similar buildings before

请帮忙给出正确答案和分析，谢谢！