Riseup and Shine Corporation has 3,000 shares of $100 par value, 7 percent cumulative preferred stock, and 10,000 shares of $10 par value common stock outstanding during its first five years of operation. The Corporation paid cash dividends as follows:

2016, $10,500;

2017, $0;

2018, $65,000;

2019, $30,000;

2020, $15,000.

The amount of dividends in arrears at the end of 2017 was:

a. $31,500.

b. $21,000

c. $17,500.

d. $10,500