How Are Income Taxes and FICA Taxes Applied to Gross-Up

How are income taxes and FICA taxes applied to gross-up pay? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left
With a question mark will be automatically graded as incorrect.)

A) Subtract the sum of the income tax rate and FICA tax rate from 100 percent.
B) Compute the sum of the income tax and FICA tax rates.
C) Divide the net pay by the net tax rate.
D) Multiply the gross pay by the sum of the income tax and FICA tax rates.