Final answer:
Dr. Fraser Crane would be interested in studying Early adulthood (D) if he is focusing on the period of emerging adulthood, which encompasses late teens to mid-20s known for identity exploration and life transitions.
Step-by-step explanation:
If Dr. Fraser Crane is interested in studying the period of emerging adulthood, he would most be interested in studying D) Early adulthood. Emerging adulthood is a phase of the life span that has been identified as covering approximately 18 to the mid-20s, an age range that falls within early adulthood. This period is known for being a time of transition and formation of adult identities with a focus on exploring work and love opportunities.
The phenomenon of emerging adulthood has come into focus in recent sociological and psychological research due to changes in educational and career paths, as well as cultural shifts in the timing of life events such as marriage and family formation. Studying this stage can provide insights into the adaptive processes of young adults as they navigate increasingly complex social landscapes.