William Owns a Car That He Values at $3000

William owns a car that he values at $3000.Jackson values the car at $5000.The negotiations between them for a potential trade are as follows: William offers a price to Jackson.If Jackson accepts, trade takes place at that price.If Jackson rejects, bargaining proceeds to the next round in which Jackson gets to make a price offer to William.At this point, if William accepts, trade takes place at the price suggested by Jackson.If William rejects the offer, no trade takes place between them.William keeps the car and Jackson gets a payoff of $0.Given the equilibrium outcome of the negotiations, what are the realized gains from trade?

A) $5000
B) $4000
C) $3000
D) $2000
E) $1000