The correct answer is C. in.
Adolescence is a time of great change and development. Adolescents are often trying to figure out who they are and what they want to do with their lives. They may be struggling with their identity, their relationships, and their future. During this time, it is common for adolescents to get caught up in their thoughts and dreams. They may spend a lot of time thinking about the future, their goals,
and their hopes and dreams. They may also spend a lot of time thinking about their relationships with their friends, family, and romantic partners.The word “in” is the best choice because it suggests that adolescents are immersed in their thoughts and dreams. They are not just thinking about them, they are living in them. They may feel like they are lost in their thoughts and dreams, and they may have difficulty focusing on anything else.
The other options are not as good because they do not suggest that adolescents are immersed in their thoughts and dreams. The word “around” suggests that adolescents are surrounded by their thoughts and dreams, but they are not necessarily focused on them. The word “of” suggests that adolescents are thinking about their thoughts and dreams, but they are not necessarily immersed in them. The word “on” suggests that adolescents are working on their thoughts and dreams, but they are not necessarily lost in them.