B.) phone call
because when you call the angry customer you can talk to them and work it out. If you do the others it will be complicated and calling is more easier. In my opinion I will call.
The correct way to put this would be I hardly have five hours of sleep a night upon arrival, but it's worth it.
Answer:
it is the last one
Explanation:
it uses the conjunction "nor"
Well since you are trying to persuade the listener, I would say B. Opinion, Illusion.
Answer:
Desde el punto de vista lingüístico, la diferencia más visible entre las dos palabras tiene que ver con el lugar desde donde parte la acción. El compromiso se origina en el interior, emana desde donde antes no existía, y la obligación se impone desde fuera.