已知$$\triangle +\triangle =\bigcirc +\bigcirc +\bigcirc $$，$$\bigcirc +\bigcirc +\bigcirc =\square +\square +\square $$，$$\bigcirc +\square +\triangle +\triangle =100$$，则$$\triangle =$$． 
选项为:A:$$20$$  B:$$25$$  C:$$30$$  D:$$36$$  请回答其中一个选项.