Partners in MNO Partnership Have Capital Accounts and Income-Sharing Percentages

Partners in MNO Partnership have capital accounts and income-sharing percentages as follows:
$$\begin{array} { | l | c | c | } \hline & \text { Capital Balance } & \text { Income Share } \\\hline \text { Partner M } & \$ 150,000 & 25 \% \\\hline \text { Partner N } & 320,000 & 50 \% \\\hline \text { Partner O } & \underline { 180,000 } & \underline { 25 \% } \\\hline \text { Totals } & \underline { \$ 650,000 } & \underline { \underline { 100 \% } } \\\hline\end{array}$$ Partners M and N buy Partner O's interest for $200,000, using their personal assets. The partners retain their relative income-sharing ratio. After this transaction, Partner M's capital balance is:

A) $195,000
B) $190,000
C) $170,000
D) $210,000