The weather event known as a "supercell" occurs when a rotating updraft meets a downdraft: ___________ heavy rain, hail, or violent tornadoes.
Which choice completes the text so that it conforms to the conventions of Standard English?
high- wind speeds create a dangerous environment: low- pressure systems result in a vortex: and rotation produces
high- wind speeds create a dangerous environment; low- pressure systems result in a vortex; and rotation produces
high- wind speeds create a dangerous environment: low- pressure systems result in a vortex and rotation produces
high- wind speeds create a dangerous environment; low- pressure systems result in a vortex and rotation produces
Correct Answer: B
Choice B is the best answer. Semicolons are used to separate items in a list when the items themselves contain internal punctuation or are long independent clauses.
Choice A is incorrect because colons are not used to separate list items. Choice C is incorrect because colons are not used to separate list items. Choice D is incorrect because the final semicolon is missing before the "and."