A.
Increases as the moisture content of wool increases 随着羊毛含湿量的增加而升高
B.
Increases as the moisture content of wool reduces 随着羊毛含湿量的增加而降低
C.
Increases as the moisture content of wool first increases then reduces 随着羊毛含湿量的增加先升高后降低
D.
Is unaffected by the moisture content 不受含湿量的影响