Which is true about the degree of the sum and difference of the polynomials 3x5y – 2x3y4 – 7xy3 and –8x5y + 2x3y4 + xy3?a. Both the sum and difference have a degree of 6.b. Both the sum and difference have a degree of 7.c. The sum has a degree of 6, but the difference has a degree of 7.d. The sum has a degree of 7, but the difference has a degree of 6.