The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

   A. when    B. why    C. whether      D. that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when            B. why              C. whether              D. that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when        B. why       C. whether              D. that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when

B. why

C. whether

D. that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when            B. why              C. whether              D. that