While 3D printing is a revolutionary method for manufacturing complex _________ not always cost-effective for mass production.
9
writingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
parts. It's
B
parts, it's
C
parts; it's
D
parts it's
Correct Answer: B
Choice B is the best answer. The comma correctly separates the dependent clause starting with "While" from the main independent clause.
Choice A is incorrect because it creates a sentence fragment. Choice C is incorrect because a semicolon cannot follow a dependent clause. Choice D is incorrect because it creates a run-on sentence.