A nurse is caring for an adolescent who is experiencing recurring manifestations of influenza. Which of the following phases of Selye's General Adaptation Syndrome (GAS) explains the possible cause for the adolescent's manifestations?

The correct answer is C: Exhaustion Phase. In Selye's General Adaptation Syndrome, the Exhaustion Phase occurs after prolonged exposure to stressors, leading to depleted resources and weakened immune response. In the case of the adolescent with recurring manifestations of influenza, the continued stress from the illness may have led to exhaustion of the body's adaptive mechanisms, making the adolescent more susceptible to infections. The other phases are not applicable in this scenario: A - Adaptive Phase is the initial response to stress, B - Resistance Phase is when the body tries to cope with ongoing stress, and D - Alarm Phase is the immediate reaction to stress.