【名词&注释】
四物汤、六味地黄丸、脾肾阳虚(yang deficiency of spleen and kidney)、玉屏风散(modified jade screen powder)、滋补肾阳(invigorate the kidney-yang)
[单选题]六味地黄丸的功用是( )
A. 滋补肾阳(invigorate the kidney-yang) B. 滋补肾阴 C. 补益肾气 D. 补养气血 E. 益肾健脾