Given a constant named size with a value of 5, which statement can you use to define and initialize an array of doubles named gallons with 5 elements? a. double gallons[size] = { 12.75, 14.87, 9.74, 6.99, 15.48 }; b. double gallons[size] { 12.75, 14.87, 9.74, 6.99, 15.48 }; c. double gallons[] { 12.75, 14.87, 9.74, 6.99, 15.48 }; d. all of the above e. a and b only