Final answer:
An example of a maturational crisis is an elderly individual adjusting to retirement and changes in social roles.
Step-by-step explanation:
A maturational crisis refers to a period in an individual's life when they face significant developmental challenges or transitions. Based on the given options, an example of a client experiencing a maturational crisis would be an elderly individual adjusting to retirement and changes in social roles (option D). This stage of life involves adapting to a new phase characterized by a decreased level of work engagement and adjustments in relationships and daily routines. It can be a time of reflection, adjustment, and searching for new meaning and purpose.