We now know that humans have evolved not to subsist on a single, Paleolithic diet but to be______eaters, an insight that has important implications for the current debate over what people today should eat in order to be healthy.（）

A. The author presents the general argument of an academic school, describes the argument more thoroughly, concluding with a criticism of the school.
B. The author presents his thesis, draws on the work of other historians to support his thesis, and concludes by reiterating his thesis.
C. The author summarizes his work, then carefully examines the work of other historians to demonstrate how they stand in conflict.
D. The author presents his thesis, contrasts it with the work of other historians, provides support, then concludes with a refrain of his thesis.
E. The author compares and contrasts the work of several historians and then discusses areas for possible new research.

A. A non-violent revolution intent upon replacing an old order with a new one.
B. A violent revolution intent upon replacing the leadership, but maintaining, an old order.
C. A non-violent revolution intent upon replacing the leadership, but maintaining, an old order.
D. A violent revolution intent upon replacing an old order with a new one.
E. A violent revolution intent upon maintaining the current leadership, but replacing the old order with a new one.