Skillful farming ______ them to support a large population.

Skillful farming ______ them to support a large population.
A、enabled
B、forced
C、authorized
D、required
【正确答案】：A
【题目解析】：句意：有技术的种植让他们能够提供大量人口（的需求）。A enabled 使..能够；B 逼迫 ；C 认可、审定、批准； D 需要。故选项A符合题意。