Answered

Which practice was common among modernist poets?

A using experimental techniques

B employing traditional forms

C following strict meter

D writing in formal language

i think its A

Verified Answer :

Kalahira

I agree with you - the correct answer is A. using experimental techniques.
Modernism, as the name itself says, was all about something new and modern, something different and never seen before. So obviously experimental techniques fit those categories, which is why poets and other writers often liked to employ them.