In the Late 1990s and Early 2000s,in the United States

In the late 1990s and early 2000s,in the United States

A) negative increases in productivity were experienced.
B) productivity growth improved, returning to levels closer to those of the 1960s.
C) increases in productivity averaged zero.
D) productivity achieved the lowest values in history.
E) the measurement of productivity was discontinued because of the ambiguity surrounding its interpretation.