Well, it depends. The wings of bats and birds, the flippers of whales, and the fins of fish are examples of both homologous(divergent) and analogous(convergent) evolution. They are homologous in that they all evolved from a common ancestral structure (tetrapod limbs) and share similar skeletal patterns. However, they are analogous in that they have evolved similar functions (flight/swimming) independently in different lineages due to similar environmental pressures. For example, the wings of birds and bats, the flippers of whales, and the forelimbs of humans all share a common skeletal framework derived from the tetrapod limb. This similarity is a result of divergent evolution, where a common ancestor's structure is modified over time to serve different functions in different species. 

Conversely,they are the result of convergent evolution, where unrelated species evolve similar traits in response to similar environmental pressures. For example, the wings of bats and birds are analogous because they both evolved to enable flight, but they evolved from different ancestral structures (bat wings from forelimbs, bird wings from limbs with feathers). Similarly, the fins of fish and the flippers of whales are analogous, as they both facilitate swimming, but they have different skeletal structures and evolutionary origins. 

Since most Biology textbooks just went straight for convergent evolution, then let's go with option D.