Bat wings are homologous to the front legs of cats. What does the term homologous mean in this context?

A) Both structures are used for the same purpose.
B) The common ancestor of bats and cats had limbs that functioned as wings.
C) The common ancestor of bats and cats had a limb with a bone structure similar to that found in cat legs and bat wings.
D) Bat wings are vestigial legs.