At the Conclusion of the Shapley-Curtis Debate in April 1920,the

Multiple Choice

At the conclusion of the Shapley-Curtis debate in April 1920,the general understanding of the astronomical community toward the "spiral nebulae" was

A) that the "spiral nebulae" were part of the Milky Way Galaxy.
B) that the "spiral nebulae" were distant island universes like the Milky Way Galaxy.
C) still inconclusive.
D) that some "spiral nebulae" were within the Milky Way Galaxy and others were far outside it.