ONly 1 rec enough?

Hello All,

So I am going to apply via the common app and had 2 teachers write me a recommendation letter. However, I know that some of my teachers recommendation will be far stronger than the other so I was thinking of just submitting teacher rec ( the univeristy only requires 1 teacher rec) , will this be look bad? If yes, how bad?

two letters: optional
one letter: required

i.e. if you just want to send one, do so.