与全口义齿吸附固位力关系最密切的是

A．后堤区的宽窄
B．牙槽嵴的高低
C．基托厚度
D．黏膜的厚度
E．边缘封闭的好坏

Which of the following is more important in determining the amount of free surface that will be produced?（）.

A.The breath of the tank

B.The length of the tank

C.The amount of liquid in the tank

D.The position of the tank in relation to the center line of the vessel