【单选题】

It can be inferred from the last paragraph that in Ohio ______.
A．prepaid plans require a participation at most 3 or 4 years before starting college

B．children may start college 3 or 4 years earlier than at a normal age if they prepay tuition
C．college tuition 3 or 4 years later may not be so high as today's price of prepaid tuition
D．the younger a child to join the plan, the greater loss he/she will suffer at the age for college