一道语法难题请教高手

PP上的:

      hotographer Edward Steichen constantly (experimented new) techniques and materials

(in) his quest (to have) photography accepted (as) a creative art.

我选的是第三个错, 但不对. 请问哪个是错的, 为什么呢? 谢谢.

experimented with new 不及物动词

厉害!