On December 31, 2014, Patel Company Purchased Equity Securities as Trading

On December 31, 2014, Patel Company purchased equity securities as trading securities. Pertinent data are as follows: On December 31, 2015, Patel transferred its investment in security C from trading to available-for-sale because Patel intends to retain security C as a long-term investment. What total amount of gain or loss on its securities should be included in Patel's income statement for the year ended December 31, 2015?

A) $3,000 gain.
B) $17,000 loss.
C) $20,000 loss.
D) $35,000 loss.