Which story line primarily concerns external conflict?

in “two friends,” one man must decide between his own personal safety and the safety of his friend.

in “one thousand dollars,” a carefree young man has inherited a small sum with the condition that he reports how he spends it.

in “to build a fire,” a newcomer sets out alone on foot when the temperature is seventy-five degrees below zero.

in “the monkey’s paw,” a couple is given the opportunity to ask for three wishes.