A person has $50,000 in taxable income for a year and pays a 10 percent income tax rate, equal to $5,000. Which action would reduce the amount the
person paid in taxes to $1,000?
O A. Receiving a $49,000 tax deduction
B. Receiving a $4,000 tax credit
a
C. Receiving a $49,000 tax credit
D. Receiving a $4,000 tax deduction

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.