Explanation
Correct answer: B.
Choice B is the best answer. The convention being tested is end-of-sentence punctuation. This choice correctly uses a period to punctuate a declarative sentence ("For example...neighborhood").
Why the other choices are wrong
Choice A
Choice A is incorrect. It’s unconventional to use a question mark in this way to punctuate a declarative sentence.
Choice C
Choice C is incorrect. The structure requires a declarative clause at the end of the sentence that states where Soto saw the steel panels, not an incomplete interrogative clause that asks a direct question, such as "would Soto see in her neighborhood."
Choice D
Choice D is incorrect. The structure requires a period and a declarative clause at the end of the sentence that states where Soto saw the steel panels, not an incomplete interrogative clause asking a direct question, such as "would Soto see in her neighborhood?"