What are the selection techniques of balsam pear?（）

A、 The shape of a good balsam pear is straight, with sharp ends. It feels strong and hard;
B、Good shape of balsam pear;
C、The color from green to white, generally the more green balsam pear is more bitter;
D、The tighter the texture on the surface of balsam pear, the more bitter it is