单选题A large population in an underdeveloped country may lead to ______.A a rise in work efficiencyB a shortage of farm workersC a decline in grain productionD a reduction in average income
题目
单选题
A large population in an underdeveloped country may lead to ______.
A
a rise in work efficiency
B
a shortage of farm workers
C
a decline in grain production
D
a reduction in average income