In Drosophila Melanogaster,the Dominant Allele Cy Results in Curly Wings

In Drosophila melanogaster,the dominant allele Cy results in curly wings.Interestingly,however,temperature also plays a significant role on the wing phenotype. $\begin{array}{llc}\text { Genotype } & \text { Temperature at } & \text { Proportion of individual } \\&\text { which raised }&\text { with curly wings }\\C y^{+} / C y^{+} \text {(wild type) } & 17^{\circ} \mathrm{C} & 0 \% \\C y^{+} / C y^{+} \text {(wild type) } & 26^{\circ} \mathrm{C} & 0 \% \\C y / C y^{+} \text {(mutant) } & 17^{\circ} \mathrm{C} & 15 \% \\C y / C y^{+} \text {(mutant) } & 26^{\circ} \mathrm{C} & 100 \%\end{array}$

Based on this information we can say that:

A) the expressivity and penetrance of the Cy allele are temperature-dependent.
B) the expressivity of the Cy allele is incomplete.
C) the expressivity of the Cy allele is temperature-dependent.
D) the penetrance of the Cy allele is incomplete.
E) the penetrance of the Cy allele is temperature-dependent.