What evidence did mary leakey use to understand how early humans thought and felt?
a)carvings at an ancient site
b)bones from a garbage heap
c)footprints in volcanic ash
d)weapons on a battlefield

d. it adversely affected american productivity

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation:

i think that the right answer is the aztecs