The company's _________ "smart glass," five years in development, allows windows to tint automatically.
6
writingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
product
B
product-
C
product,
D
product:
Correct Answer: C
Choice C is the best answer. A comma is used to set off the appositive "smart glass" which follows "product."
Choice A is incorrect because punctuation is needed to set off the appositive. Choice B is incorrect because a dash should be paired with another dash if used for appositives. Choice D is incorrect because a colon is not standard here.