Many teens get their first job during adolescence, which
a. usually provides more anxiety than it's worth
b. teaches workplace skills and etiquette
c. illustrates that work performance isn't related to success
d. all of the above

The first jobs which teens will often get during adolescence mostly serves as a good springboard which teaches workplace skills and etiquette. However, this also may vary, depending on the job a certain teen does. The correct answer for that reason is  B.