In the Context of Work and Aging, Which of the Following

In the context of work and aging, which of the following statements is true of older adults?

A) When older adults engage in complex working tasks and challenging daily work activities, their cognitive functioning shows less age-related decrease.
B) Employment gaps involving unemployment or sickness are associated with a lower risk of cognitive impairment in older adults.
C) Working in a job with a high level of mental demands is linked to lower levels of cognitive functioning before retirement in older adults.
D) For older adults who work in low-complexity jobs, experiencing novelty in their work is linked with a reduction in processing speed and working memory.