Which Hypothesis Explains the Observed Differences in the Rate of Neurocognitive

Which hypothesis explains the observed differences in the rate of neurocognitive disorder due to Alzheimer's disease for individuals of varying educational levels?

A) The abilities acquired through formal education help compensate for some of the deficits of the disorder for a longer period.
B) Higher levels of formal education are associated with higher levels of income and better access to quality health care.
C) Higher levels of formal education are associated with lifestyles that include improved diet and higher levels of regular exercise.
D) Occupations associated with lower as compared to higher levels of formal education expose individuals to a greater range of environmental toxins and physical stressors.