DIFFIDENT:

A． An increased saturation of the private sector with immigrants
B． The persistence of non-African American ethnic niches in certain sectors of the economy
C． A respite from competition found in the immigrant-saturated private-sector
D． A decline in the number of apparel manufacturing jobs available to African- Americans
E． A decrease in the level of educational credentials among new immigrants

A． elements commonly used in biochemistry
B． elements that produce only a single desired product through their reaction
C． elements more common in nature than alkali metals
D． elements less efficient at producing electrical charges than alkali metals
E． elements which are sometimes used in simple reagent design