Final answer:
The correct answer is 'A) Astray,' referring to the biblical passage Isaiah 53:6, which speaks of humanity's departure from righteousness and the atonement of sins by a singular figure.
Step-by-step explanation:
The correct answer to the fill-in-the-blank question you've asked is A) Astray. The full phrase 'All we like sheep have gone astray; we have turned—every one—to his way; and the Lord has laid on him the iniquity of us all' is a well-known passage that comes from the Bible, specifically Isaiah 53:6. This verse is often interpreted as referring to how humans have strayed from the path of righteousness and how the transgressions or sins of humanity have been laid upon a singular figure, understood by Christians as Jesus Christ, to atone for them.