Samantha is putting a layer of topsoil on a garden plot. She measures the plot and finds that the dimensions of the plot are 5 meters by 21 meters. Samantha has a bag of topsoil that covers an area of 106 square meters. Should she buy another bag of topsoil to ensure that she can cover her entire plot? Explain.
a) Yes, she needs another bag as the area is 105 square meters.
b) No, she doesn't need another bag as the area is less than 106 square meters.
c) Yes, she needs another bag as the area is greater than 106 square meters.
d) No, she doesn't need another bag as the area is exactly 106 square meters.