Explanation
Correct answer: D.
Choice D is the best answer. The convention being tested is end-of-sentence punctuation. This choice correctly uses a period to punctuate a declarative sentence that ends with an indirect question (“which link you should choose.”)
Why the other choices are wrong
Choice A
Choice A is incorrect. The structure requires a declarative clause that presents an indirect question about what is evaluated in click restraint, not an interrogative clause that presents a direct question, such as “which link should you choose.”
Choice B
Choice B is incorrect. It’s unconventional to use a question mark in this way to punctuate a declarative clause that presents an indirect question, such as “which link you should choose.”
Choice C
Choice C is incorrect. The structure requires a declarative clause that presents an indirect question about what is evaluated in click restraint, not an interrogative clause that presents a direct question, such as “which link should you choose.”