A challenge of studying middle adulthood is ______.

A) so few changes occur among people in this time period
B) it is a long time period with people having multiple roles
C) few people reach this time period
D) there is little variety among these people

Studying middle adulthood is a challenge because it is a long time period (usually from around age 40 to 65) and individuals in this stage often have multiple roles, such as being parents, professionals, caregivers, and community members. This complexity can make it difficult to generalize about this stage of life. A and D are not accurate as there are significant changes and diversity among people in middle adulthood. C is also not accurate as many people reach this stage of life.