Answer:
A). Activation of SYMPATHETIC nervous system by new experience.
Explanation:
According to the studies, the initial increase in heart and the breathing rates at the time of skin diving trip was mainly an outcome of the 'activation of sympathetic nervous system due to the new experience'. The new experience causes a 'fight or flight response' that secretes 'adrenaline' and thus, it eventually end up in 'elevated pulse rates' and 'breathing' during the trip that indicates the activation of 'sympathetic nervous system'. Thus, <u>option A</u> is the correct answer.
North Korea considers the United States a threat and an outsider that shouldn’t be on the Korean Peninsula. The military exercises are seen as a act of agression