4. People in Panama started farming between 9,000 and 7,000 BCE but did not rely on it as their only food source. What evidence from the text supports this conclusion?
A. "Places we once thought were wild were perhaps maintained by ancient people."
B. "One clue is when people began farming. On the land bridge, this was around 9,000
and 7,000 BCE."
C. "Scientists have found evidence that people were growing bottle gourds, squash, and
a few other things around that time. These would be in small gardens, not big farms."
D. "It is hard to tell when people stopped traveling along the land bridge and began living
there."