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________evidence that language acquiring ability must be stimulated.

A. If being     B. It is   C. There is   D. There being

________evidence that language acquiring ability must be stimulated.

A. If being     B. It is   C. There is   D. There being

________evidence that language acquiring ability must be stimulated.

      A. If being    B. It is  C. There is  D. There being

________evidence that language acquiring ability must be stimulated.

       A. If being     B. It is   C. There is   D. There being

________evidence that language acquiring ability must be stimulated.