A-Corp owns 100% of B-Corp and C-Corp. A-Corp sells its C-Corp stock to D-Corp during 2014. All letters refer to domestic corporations that own one class of stock and are includable. -Does A-Corp's sale of it's C-Corp stock end the affiliated group? -Does C-Corp have to file a consolidated return with D-Corp? -If A-Corp repurchases the C-Corp stock that it previously sold to D-Corp in 2017, would C-Corp have to file a consolidated return with A-Corp and D-Corp?