Sam owns 70 percent of the stock of Club Corporation. Unrelated individuals own the remaining 30 percent. For a stock redemption of Sam's stock to be treated as an exchange under the "substantially disproportionate" test, what percentage of Club stock must Sam own after the redemption?

Group of answer choices

Any percentage less than 70 percent

Any percentage less than 56 percent

Any percentage less than 50 percent

All stock redemptions involving individuals are treated as exchanges.