which of the following is an effective thesis statement for a compare and contrast essay A" i believe orcas are more intresting than dolphins because they are known as killer whales" B "orcas and dolphins are memebers of the same taxonomical family due to some similarities but they have many behavioral diffrerences" C " orcas are called killer whales but are actually members of the dolphin family for a number of reasons" D" orcas and dolphins are alike and diffrerent they are alike because of some phsycial similarities they are different because of their behavioral