Final answer:
A freeze that kills half of the orange crop in Florida would likely cause a rise in the price of oranges due to a decrease in supply. Growers typically protect crops with a freezing water method, but a severe freeze could render this ineffective.
Step-by-step explanation:
The event most likely to cause a rise in the price of oranges is A: A freeze kills half of the orange crop in Florida. This is because the supply of oranges would significantly decrease due to the crop damage, leading to scarcity. The principles of supply and demand indicate that when the supply of a good decreases, the price typically increases if demand remains constant. In real-world scenarios, when growers in Florida are faced with temperatures near the freezing point, they use a method where they spray water on their orange trees, which freezes and releases energy, thereby keeping the oranges at a temperature above freezing to prevent damage. However, if a freeze is severe enough to kill half of the orange crop, this protective measure may not suffice, resulting in a significant loss of produce and an increase in price.