KEITH, INC., BECOMES AN S CORPORATION on January 1, 20X1. Sally, the sole shareholder, has a stock basis of $20,000 at January 1, 20X1, an accumulated adjustments account (AAA) balance of $0, and an earning and profits account in the amount of $6,000. For the 20X1 taxable year, Keith, Inc., has the following: Taxable income $30,000 Tax-exempt income $4,000 Capital gain $5,000 Expenses applicable to tax-exempt income $1,000 Charitable contributions $400 Disallowed 50% of meal and entertainment expenses $800 Cash distribution to Sally $18,000 What is the AAA of Keith, Inc., at December 31, 20X1? A. $15,800 B. $22,300 C. $25,000 D. $34,000