According to the passage, how fast can you expect to read after you have attended twelve h

According to the passage, how fast can you expect to read after you have attended twelve half-hour lessons in the University of Minnesota？

A．You can increase your reading speed by three times.

B．No real increase in reading speed can be achieved.

C．You can increase your reading speed by four times.

D．You can double your reading speed.

请帮忙给出正确答案和分析，谢谢！