Answer:
D) Similarly
Step-by-step explanation:
This is what is would look like in a sentence.
A) Although they might be different, they are both alike in many ways, etc.
B) Instead, they could be combined as both, etc.
C) However... They would not be alike if Etc etc.
D) Similarly, they are not very different.
The sentences are an example, I chose what I think would be right.