Zhao Benshan, whose overwork _______ his health failure last year, is said to perform in the coming Spring Festival Gala on CCTV

1. A.
   submitted to
2. B.
   admitted to
3. C.
   contributed to
4. D.
   subscribed to

Zhao Benshan, whose overwork _______ his health failure last year, is said to perform in the coming Spring Festival Gala on CCTV.

A. submitted to     B. admitted to          C. contributed to        D. subscribed to