If the adolescent fails to resolve the identity crisis by the time of entry into

The answer is "adopting".  It is an excerpt from the book of Andrea Sofroniou, "Therapeutic Psychology". It tackles Adolescence, a Psychosocial Stage by Erik Erikson, where an individual (aged 12-19 years), encounters conflict between his identity and feelings of confusion. 

"If the adolescent fails to resolve the identity crisis by the time of entry into adulthood, he will feel a sense of role confusion or identity diffusion. Others seem to avoid the crisis altogether and settle easily on an available, socially approved identity. Still others resolve their crises by adopting an available but socially disapproved ideology. This latter option is called negative identity formation and is often associated with delinquent behavior. Resolution of the adolescent identity crisis has a profound influence on development during later adulthood."

The situation climaxed with the October Revolution in 1917, a Bolshevik-led armed insurrection by workers and soldiers in Petrograd that successfully overthrew the Provisional Government, transferring all its authority to the Soviets. They soon relocated the national capital to Moscow.

Explanation: