From 1948 to 1961, the proportion of American blacks earning less than $3,000 a year declined from 78 to 47 percents at the same time, blacks earning more than $10,000 increased ______ from less than 1 to 17 percent. (proportion)

A．dying our as Puritan influence began m grow
B．self-consciously and distinctively Southern
C．more characteristic of the Southern colonies than of England
D．spreading to Massachusetts and Connecticut

A．the ability to adjust one’s behavior in light of the behavior of others
B．the degree of stability one can create m one’s immediate environment
C．the accuracy with which one can predict future events
D．the success one achieves in conserving and storing one’s resources