Bret Harte, (which) best-known works describe life in California in the mid-1800’s, (helped shape) the (literary) movement (called) local-color writing.

A．cloning animals has already assisted human beings a lot in two aspects
B．his techniques may be applicable to people in order to create geniuses
C．line should be drawn and cloning animals is offensive
D．cloned sheep engineered to produce drugs in milk can be used as living drug factories

A．an academic aspect
B．a military aspect
C．a business aspect
D．an international aspect