Sonya is shopping for clothes. She buys a sweater that costs s dollars and a dress that costs d dollars. The sales tax is 8%. Sonya can find the amount of tax by using the expression 0.08s + 0.08d or by using the expression
0.08(s + d).
What do these two expressions demonstrate about the situation?
A. Sonya must find the total cost in order to find the amount of the tax.
B. Sonya should use the second expression because the numbers will be smaller.
C. Finding 8% of the total cost is not the same as adding 8% of each individual cost.
D. Calculating the tax on each item separately and then adding is the same as calculating the tax on the total cost.