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The problem, according to the experts, is _______ we should do with the salty land.

.

The problem, according to the experts, is ________ we should do with the salty land.

  A. what              B. whether             C. how                 D. that

The problem, according to the experts, is ________ we should do with the salty land.

A. what　　　 B. whether　　　　 C. how　　　　　 D. that

 The problem, according to the experts, is _______ we should do with the salty land.

       A. that                          B. how                         C. which                      D. what

.
The problem, according to the experts, is ________ we should do with the salty land.