For the Past 30 Years in the United States, the Long-

For the past 30 years in the United States, the long- and short-run marginal propensities to consume have been estimated to be

A) 0.72 and 0.94, respectively.
B) 11.2 and 4.1, respectively.
C) 0.94 and 0.77, respectively.
D) identical and equal to 0.94.
E) too volatile to attribute to a single number.