She had to buy a new battery for her mobile phone because the charge was unable to last for

A. The new battery she bought for her mobile phone would not hold a charge for longer than two hours 

B. Because she charged her new mobile phone battery for only two hours, the charge did not last very long. 

C. She had to charge a new battery for her mobile phone because the old one lasted for a little over two hours. 

D. Her mobile phone couldn't hold a charge for more than two hours, so she had to buy a new battery.