Returning veterans of the vietnam war

a. were greeted with lavish welcome-home parades
b. had difficulty at times adjusting to civilian life
c. had time aboard ships to unwind and discuss their wartime experience
d. suffered from what was called "soldier's heart"

B. had difficulty at times adjusting to civilian life

Explanation:

b. africa to the americas

explanation:

depends on the age of the teen, many believe by the age of 16 a person should know the strong difference between right and wrong along with the difference between risky and immediate death. swimming with sharks might be dangerous but swimming with sharks while bloody meat is attached to you is just insane. even more if you have no idea what you're doing. however, no matter the age, as long as the person is skilled enough and has the mental and physical capacity to control their actions doing whatever sport they put their mind to is all that matters.