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The trouble is ____ we can not find such an expert.

A. why                 B. that                  C. where                  D. /

The trouble is ____ we can not find such an expert.

A. why                 B. that                  C. where                  D. /

The trouble is ____ we can not find such an expert.

A. why                 B. that                  C. where                  D. /

The trouble is ____ we can not find such an expert.

A. why                 B. that                  C. where                  D. /

The trouble is ____ we can not find such an expert.

A. why                 B. that                  C. where                  D. /