14. One evening, students Chloe and Zoe each independently solved half of the problems in their homework, and then they worked together to solve the other half of the problems. Chloe's correct rate for solving problems independently is $80 \%$, and her overall correct rate is $88 \%$. It is known that Zoe's correct rate for solving problems independently is $90 \%$. Then Zoe's overall correct rate is ( ).
(A) $89 \%$
(B) $92 \%$
(C) $93 \%$
(D) $96 \%$
(E) $98 \%$
14. C.

Let there be $x$ questions in total, and the correct rate of the two people working together is $y$. According to the problem, we have
$$
\begin{array}{l}
\frac{\frac{1}{2} x \times 80 \%+\frac{1}{2} x y}{x} \times 100 \%=88 \% \\
\Rightarrow y=96 \% .
\end{array}
$$

Therefore, Zoe's total correct rate is
$$
\frac{\frac{1}{2} x \times 90 \%+\frac{1}{2} x \times 96 \%}{x} \times 100 \%=93 \% .
$$