How do i convince my mom to let me do jujuitsu?? help!?

ok im a 13 yr. old girl and i really like martial arts. i asked my mom if i can do jujitsu and she flat out said no. i tried to explain but she didnt wanna hear it. she doesnt like the close contact. i dont understand her reasoning at all!! Soo i asked if i can do another type of martial art and she said yes but the place i wanna go to has some grappling and jujitsu in it and i reeeaaally want to do this. pleassse help me convince my mom to let me!!