In May 2017, the Financial Times reported that avocado prices have hit a world record high ("Poor weather helps push avocado prices to a record," May 5, 2017). Which of the following would cause the entire demand curve for fresh avocados to shift to the right? This is a multiple-choice question: please choose the single best answer and explain your choice.
a. Bad weather in Mexico, which is world's largest producer of avocados.
b. A series of consumer-oriented health studies showing that the avocado is a "superfood" with many health related benefits.
c. The price of tortilla chips (used for snacking with guacamole, made with avocados) rises.
d. The price of almonds, also increasingly considered a healthy superfood, falls.
e. There is a general downturn in the economy, resulting in an overall lowering of incomes.