"put your foot down" VS "put your feet down", which one is correct to say? Here I listed out two sentences, which are similar to each other. Which sentence is correct to say? A. You must reasonably make up your mind or put your foot down. or B. You must reasonably make up your mind or put your feet down. I'd choose "A", but I am not sure! Therefore, please do me a fovor for making any firm confirmations! Thank you in advance!