Did Reinhard Marx propose the change to the church's teaching?
No
Yes
It's not known
He was a co-proposer
Answer
Reinhard Marx did not propose the change to the church's teaching. In fact, he has been a vocal opponent of the change. He has said that the change would be a "grave error" and that it would "undermine the foundations of the church."
The Maverick Cardinal: Testing Your Knowledge on Reinhard Marx's Controversial Stance!