The grid below is to be filled with integers in such a way that the sum of the numbers in each row and the sum of the numbers in each column are the same. Four numbers are missing. The number x in the lower left corner is larger than the other three missing numbers. What is the smallest possible value of x?
\begin{array}{|c|c|c|} \hline -2 & 9 & 5 \\ \hline & & -1 \\ \hline x & & 8 \\ \hline \end{array}
Answer Choices
A. -1
B. 5
C. 6
D. 8
E. 9