在制作义齿支架前进行模型缓冲的原因是

A．有利于义齿的取出

B．有利于义齿的移位

C．增强义齿的固位

D．改善义齿的稳定性

E．避免义齿戴入后压痛患者黏膜

An analyst doe research about a U. S. Treasury Inflation Protection Security (TIPS). With respect to a TIPS, Which of the following statements is most accurate Changes in the reference price index resultin changes in:（）

A. the TIPS' coupon rate.

B. the TIPS' principle amount.

C. both the TIPS' coupon rate and the TIPS' principle amount.