I want to know the answer to the following question:
Who endorsed a move to use Persia and Iran interchangeably after opposition to the official name change?
All the background I'm provided with is that "" Opposition to the name change led to the reversal of the decision, and Professor Ehsan Yarshater, editor of Encyclopædia Iranica, propagated a move to use Persia and Iran interchangeably.". Is that enough to answer the question?