Which of the Following Best Explains the Fact That Bands

Which of the following best explains the fact that bands of Indian hunters remained small in the area of the Great Basin (present-day Nevada and Utah) ?

A) The disease environment dramatically lowered the life expectancy of the inhabitants of the Great Basin.
B) The tribes of the Great Basin enacted laws that imposed strict limitations on the size of each band within the tribe.
C) The inadequate supply of large game made it difficult to find food in sufficient quantity to support large groups.
D) The practice of human sacrifice significantly reduced the population of the bands and tribes of the Great Basin.