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The reason__________ their failure you know is _____they didn't get fully prepared for the experiment.

A. why.., that                      B. that.., why   

C. for.., that                      D. why.., because

The reason__________ their failure you know is they didn't get fully prepared for the experiment.

A. why.., that         B. that.., why         C. for.., that          D. why.., because

The reason__________ their failure you know is they didn't get fully prepared for the experiment.

  A. why.., that                      B. that.., why   

C. for.., that                      D. why.., because

The reason__________ their failure you know is they didn't get fully prepared for the experiment.

A. why.., that      B. that.., why        C. for.., that      D. why.., because

The reason ____ their failure you know is _____ they didn’t get fully prepared for the experiment.