Final answer:
The TASK of the Transition stage for adolescents is crystallizing a vocational preference.
Step-by-step explanation:
The TASK of the Transition stage for adolescents is A. Crystallizing a vocational preference. During the Transition stage, teenagers move from exploring different possibilities during the Tentative Stage to making more concrete decisions about their future. They start to narrow down their choices and focus on a particular vocational preference, solidifying their career goals and aspirations.