The cost of a single ticket depends on the number of tickets, t, purchased in a group, as represented by the function C(t). C(t) = $18.50 1 <_t < 12 $16.00 12<_t < 20 $14.50 20<_t What is the total cost for 20 tickets? A.)$14.50 B.)$16.00 C.)$290.00 D.)$320.00