The number of organisms an environment can support depends on the availability of environmental resources.
Changes in the mule deer population in Nevada from 1900-2000 are shown in the graph below.
During which years did the mule deer population most likely experience the greatest decrease of environmental
resources?
A. 1930-1950
B. 1956-1960
C. 1960-1970
D. 1976-1980
