The marginal cost of a vacation in Jamaica is $$3,000.$ The marginal benefit to Jordan of a vacation in Jamaica is $$3,500.$

a$.$

$$According to the rule of rational choice, Jordan will experience a net gain of $$500$ if he vacations in Jamaica.

b$.$

$$According to the rule of rational choice, Jordan will experience a net gain of $$3,500$ if he vacations in Jamaica.

c$.$

$$According to the rule of rational choice, Jordan should choose not to vacation in Jamaica at this time.

d$.$

$$According to the rule of rational choice, Jordan will experience a net gain of $$3,000$ if he vacations in Jamaica.