Answer:
The answer is: Rose will be taxed as receiving a $15,000 dividend distribution.
Step-by-step explanation:
Since Parent Corporation owns 70% of Child Corporation, for tax purposes they are considered as one single firm. Rose is the main stockholder of Parent Co. so for tax purposes she is also a stockholder in Child Co. When Child Co. gives her $15,000 in exchange for Parent Co. stock, this would be considered as a dividend distribution rather a stock sale.