The passage suggests that Toomre’s work complements Larson’s theory because it______
A.
specifies more precisely the time frame. proposed by Larson
B.
subtly alters Larson’s theory to make it more plausible
C.
supplements Larson’s hypothesis with direct astronomical observations
D.
provides theoretical support for the ideas suggested by Larson
E.
expands Larson’s theory to make it more widely applicable