In 1935, cane toads were introduced into Australia from Hawaii. They were introduced in an attempt to control the native grey-backed cane beetle population.
Which choice most effectively combines the two sentences at the underlined portion?
Australia
Australia; they were introduced
Australia and the cane toads were introduced
Australia; their introduction was
Correct Answer: B
Choice B is the best answer. It combines the sentences using a semicolon to link the event (introduction of toads) with the reason (pest control).
Choice A is incorrect because it creates a run-on sentence. Choice C is incorrect because it uses "and" to link clauses where one is an explanation of the other, reducing clarity. Choice D is incorrect because it turns the action into a noun phrase ("their introduction was"), which is passive and wordier.