Base your answer to question 47 on the quotation
 below and on your knowledge of social studies.
 Long before the rule of pharaohs, Egyptians grew
 wheat and barley and raised pigs, goats, sheep
 and cattle. Spotty evidence had suggested that
 agriculture was practiced there more than 7,000
 years ago, two millenniums earlier than the first
 royal dynasties.…
 — John Noble Wilford, New York Times,
 February 12, 2008
 Which period in history is referred to in this
 excerpt?
 (1) Industrial Revolution
 (2) Neolithic Revolution
 (3) Scientific Revolution
 (4) Green Revolution