Final answer:
The correct answer is B, which uses the transition ‘as well’ indicating a comparison of values between Democrats and Republicans.
Step-by-step explanation:
The sentence that includes a transition suitable for a comparison essay is:
B. Democrats place a great emphasis on freedom; as well, Republicans highly value individual freedom.
This sentence makes use of the transitional phrase as well, which is commonly used in comparison essays to show similarity or agreement between two subjects that are being compared. It implies that both Democrats and Republicans share a value, which is one of the purposes of a comparison essay - to draw connections or contrasts between subjects.