Lyzanne is an astute investor who often uses options and futures as part of her investment portfolio. Last week, she purchased a 3-month coffee future. Yesterday, she read in the financial press that the Colombian coffee market had been devastated by a severe crop failure. Columbia is a major supplier of coffee. What affect will this have on supply and demand? a) A positive shift in the supply curve for coffee. b) An increase in the demand for coffee. c) No change in consumer demand. d) A negative shift in the supply curve for coffee