The film cost a large sum of money but was not well made. It was______ (怪不得观众满怀期望而来), but left very much disappointed.

A．animal abuse is horrible and should be terminated
B．the teachers have been compelled to do all animal experiments
C．prohibition of experiments on animals will discourage students from being curious
D．the International Science and Engineering Fair will cease to operate because of the new policies

A．forgetfulness is a response to learning
B．the memory storage system is an exactly balanced input-output system
C．memory is a compensation for forgetting
D．the capacity of a memory storage system is limited because forgetting occurs