Plzzzzzzz answer my ques??

hiiiiiiii!!!!!!!!today v had an interview for US visitors visa... mine and my mom's visa got rejected......M very sad...till nw we r nt able to figure out wht went wrong......their was no prob with the doents tooo....frankly speakin v hv no intension to settle over thr...v just wanted to visit their...and my cousion mamma(mom's brother) had sent the sponsership..and m studing in india..wht's the reason behind rejection??????