Prismatic can mean "something in the shape of a prism" or "varied and arrayed colors". The best answer would be C.
B. Science museums in towns similar to Middletown have attracted many visitors, which is good for the community.
I think that the most in depth answer is D, it makes the most sense!
Answer:
My argument is slightly, but not insignificantly, different.”
...
What is the opposite of considerably?
slightly little
insignificantly somewhat
barely hardly
moderately scarcely
marginally only just