【名词&注释】
四君子汤(shi junzhitiang)、软坚散结(soften hard lumps and dispel nodes)、玉屏风散(modified jade screen powder)、月经周期(menstrual cycle)、疏肝解郁(relieving liver qi stagnation)、平肝潜阳(soothing liver and anchoring yang)
[单选题]天麻的功效是
A. 平肝潜阳(soothing liver and anchoring yang),疏肝解郁(relieving liver qi stagnation)
B. 平肝潜阳(soothing liver and anchoring yang),清肝明目
C. 平肝潜阳(soothing liver and anchoring yang),软坚散结
D. 息风止痉,平抑肝阳
E. 息风止痉,活血止痛