Harry values a new jacket at $100 and buys it from Jenny at $80 (costing her $70 to produce it). Jim then offers Harry the same jacket at $60. Harry buys the jacket from Jim, and stops buying it from Jenny. Which of the following makes this event Pareto optimal?
A) Harry and Jim join to give Jenny $70.
B) Harry pays Jim $80.
C) Harry gives Jenny $30.
D) Harry gives Jenny $11.