Answer :
The answer is D because if they are similar it means that they share a distant ancestor they evolved from.
Homologous structures are defined as similar physical structures, which share a common ancestor. These similar structures perform different functions.
Similarities in Bat's wing, Dolphin's flipper, and Cat's leg
- Cat, Bat, and Dolphins are mammals, which consist of similar structures such as limbs that are evolved to perform different functions.
- The homologous structures show evidence that organisms shared a common ancestor, most probably 60 million years ago.
Thus, the hypothesis that suggests the different structures of the organisms is that these organisms shared a common ancestor.
Learn more about homologous structures here:
https://brainly.com/question/7904813