100高分求一道简单的英语阅读理解，请高手进，都是单选题，请注明选择该项的理由

1D Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings.
2D If you watch closely, you may notice that the trainer always gives the animal a piece of candy or a piece of fruit as a reward.
3D
4C he scientists say that many different animals may be trained to do a number of simple jobs if they know they will get a reward for doing them.
5D Apes have been used in America in helping to make cars, and scientists believe that these large monkeys may be one day gather crops and even drive trains.

我满怀信心的想把你，可就冲你不诚实这点，我觉得你真的是#￥#%#￥#@#。

你没有分就别说送，大家不会怪你，你觉得大家真的要帮人会在乎这一百的百度上面的分，可你没有分还打着给100分的旗帜，你觉得这样可取吗？我最恨被别人欺骗。

最可笑您居然还是匿名的，有这么见不得光吗？

D
C
D
C
D