Which best explains how ivanovski’s work led to a change in the germ theory?

he tried to promote his hypothesis as a law.
he used a new experimental method to test his hypothesis.
he used a more powerful bacterial strain than other scientists had.
he obtained results that confirmed what other scientists were thinking.

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas