单项选择题

患者手足疼痛,肤色紫暗发凉,喜暖恶寒,得温痛减,舌淡暗,脉沉迟涩,证属:()

A.血寒证
B.血瘀证
C.气虚血瘀证
D.气滞血瘀证
E.凉燥证