The US manufacturing beef market over the past couple of weeks has had more of a bearish 【undertone】, due in part to higher stocks of frozen boneless beef.

The US manufacturing beef market over the past couple of weeks has had more of a bearish 【undertone】, due in part to higher stocks of frozen boneless beef.

A.a detailed plan

B.a strong foundation

C.an underlying tendency

D.an organized system

正确答案是C