Question

The playwright was known not for his original ideas but for his
of ideas that had been propounded by others.​

Answer 1

The playwright was known not for his original ideas but for his ideas that had been propounded by others.

Explanation:

• The playwright's work can certainly "experiment" or test common instruments, but it seems to work better if our sentence talks about "unusual instruments". In other words, using "common tools" doesn't seem like an experiment.

• This phrase could logically work, and we don't have a ton of clues, so we'll have to skip it. However, we should note that D seemed like a more logical action, as the object was a "normal device".