Consider cases where the number of withholding allowances is less than 6. Which will cause the amount of federal income tax withheld to increase?a.Gross pay stays the same and withholding allowances increase.b.Gross pay increases by more than $20 and withholding allowances stay the same.c.Gross pay increases by more than $20 and withholding allowances increase.d.Gross pay decreases by more than $20 and withholding allowances stay the same.