Following Are Selected Data from the Financial Statements of Mother

Following are selected data from the financial statements of Mother Nature Supplies: $\begin{array} { r r }& \underline { \mathbf { 2 0 1 7 } } & \underline { \mathbf { 2 0 1 6 } } \\ \text {Accounts receivable}&\$ 60,000 & \$ 38,000 \\\text {Merchandise inventory}& 12,000 & 16,000 \\ \text {Total assets}&450,000 & 380,000 \\ \text {Net sales}&380,000 & 270,000 \\ \text {Cost of goods sold}&160,000 & 210,000 \end{array}$
-Refer to the data for Mother Nature Supplies. ?
Which of the following results would be found through a vertical analysis of the balance sheet or the income statement of Mother Nature Supplies?

A) Accounts receivable increased $22,000 during 2017.
B) Total assets increased $70,000 during 2017.
C) Cost of goods sold increased $50,000 or 23.8% during 2017.
D) Gross profit is 57.9% of net sales for 2017.