The Outstanding Stock of Riccardo Corporation Is Owned as Follows

The outstanding stock of Riccardo Corporation is owned as follows: $\begin{array}{ll}\text { Robert } & 100 \text { shares } \\\text { Megan (Robert's daughter) } & 100 \text { shares } \\\text { Kyle (Robert's cousin) } & 100 \text { shares } \\\text { RMD, Inc. } & 100 \text { shares }\\\text { Total shares outstanding }& 400 \text { shares }\\\end{array}$ Robert owns 50% of RMD, Inc. stock. The rest of RMD, Inc. stock is owned by unrelated parties. Riccardo Corporation redeems 90 of Robert's shares of stock for $9,000 in the only redemption transaction this year. Robert's basis for his stock is $10 per share (100 shares @ $10 = $1,000) . Riccardo Corporation has $300,000 in E&P. What is Robert's total basis in his remaining 10 shares of stock after the redemption?

A) 0
B) $100
C) $900
D) $1,000