What is the meaning of “put one’s foot down” in the sentence “The same thing also happened to Guo Degang（郭德纲）， a famous cross-talk performer who really put his foot down and innovated the way cross-talk performs.”

What is the meaning of “put one’s foot down” in the sentence “The same thing also happened to Guo Degang（郭德纲）， a famous cross-talk performer who really put his foot down and innovated the way cross-talk performs.”
A.putting one’s feet on the ground
B.say very firmly/be very firm that someone must do something
C.be low profile
D.to make a car go faster
正确答案：say very firmly/be very firm that someone must do something