Proponents of the view that the higher rate of productivity growth since 1996 is part of a long-run trend argue it is

a result of
a. employers forcing more output from workers, who have become victims of new technologies.
b. the shrinkage of the labor force, so that output per worker is rising.
c. the rise of employment in the highly productive manufacturing sector.
d. a continuing increase in the use of computers and other kinds of information technology.

d. a continuing increase in the use of computers and other kinds of information technology.