Which is the best strategy to use to solve this problem? sophie wants to make a large rectangular sign that has an area of 60 square feet. she wants to put a border around the sign, but she wants to use as little border material as possible. what are the dimensions sophie should use for this sign? a. write a number sentence. use a number sentence to calculate the area of a rectangle. use guess and check to find two numbers that when multiplied will give a product of 60. b. make a list. create a list of all possible whole-number combinations of length and width that would equal an area of 60 square feet. then start calculating the perimeter of each rectangle. look for a pattern to decrease the number of calculations you have to make. c. use objects to model the problem. arrange 60 square tiles in different patterns that create a rectangular shape. count the number of tiles on the perimeter of each of the shapes.