We want to fence in a field whose length is twice the width and we have 80 feet of fencing material. If we use all the fencing material what would the dimensions of the field be?

a. Length: 26.66 feet, width: 13.33 feet
b. Length: 26 feet, width: 13 feet
c. Length: 26.5 feet, width: 13.25 feet
d. Length: 30 feet, width: 15 feet