Which Is the Best Example of Someone Using a Heuristic

Multiple Choice

Which is the best example of someone using a heuristic in problem solving?

A) John wants to buy a computer.He compares prices at different computer stores and buys whatever is least expensive.
B) Susan wants to know how long it will take her to drive from Phoenix to Los Angeles.She knows that the distance is 400 miles, and she figures she will average 50 miles an hour with stops, so she predicts the trip will take 8 hours.
C) Vinnie has a round hot tub that is 6 feet in diameter; he wants to build a top to cover it.He remembers the formula for calculating the area of a circle and works out how many square feet of lumber he needs.
D) Marion can't think of a plot for the short story she needs to write.She breaks her task into smaller pieces: First she will decide who or what her main character will be, then she will think of a conflict for the character to experience, and finally she will identify a reasonable resolution of the conflict.