A Parent Company Owns a 90% Interest in a Subsidiary

A parent company owns a 90% interest in a subsidiary at the start of the year and during the year sells a 10% interest to reduce its ownership percentage to 80%.The most popular view of the transaction under current consolidations theory is that

A) ​it is a sale of an investment at a gain or a loss.
B) ​it is likened to a treasury stock transaction that may not result in a gain or a loss.
C) ​it is a transaction between the controlling and non-controlling ownership interests and has no effect on consolidated income.The transaction would impact only paid-in capital.
D) ​the increase or decrease in equity as a result of the sale is an adjustment to donated capital.