Should I learn to play the Trombone or the Trumpet?

I am 14 years old and I play flute in a marching band, and my school band. I want to learn a second instrument.

I think I want to be a music teacher as a career when I am older, so I want to have more of a musical backround. I will have the flute for my main instrument, but I want to learn another instrument in my spare time.

I want to play a brass instrument and I’ve narrowed it down to trombone and trumpet. I just want to know which would be better for me, and if you play one you can talk about that too.

I don’t usually use the internet to solve my problems, and I think i’m kind of stupid for asking this, but I just want opinions from people who are more experienced.

Thanks – Lindsay