A glass company making windows for houses also makes windows for other things (cars, boats, planes, etc.). We would expect its supply curve for house windows to be: And if you can explain why please otherwise I won't rate your answer.

a.) No different than that of firms which only make those windows
b.) Dependent on the demand for boat and plane windows
c.) Relatively more elastic than those of firms which only make house windows
d.) Relatively more inelastic than those of firms which only make house windows