Detailed Instructions: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Problem:Problem: a windmill is taking advantage of strong air currents in order to produce electrical energy. on a typical day the wind speed is around 20 mph and in that speed the windmill produces 400 kw / h ( kilowatts per hour ). on a stormy day a windmill produces 20 % more energy. how much kw / h can 3 windmills produce in two hours on a stormy day ?
Options: a. 2880., b. 4860., c. 5780, d. 5760, e. 6380.
Solution:
a