Step 1: Analyzing the clues.
The clues are: Sheet, Coat, Ban, and Cover. Let’s look for a word that connects these.
Step 2: Exploring the alternatives.
(A) Metal: "Metal" doesn’t relate to any of the clues.
(B) Sheep: "Sheep" doesn’t connect with "Sheet," "Coat," "Ban," or "Cover."
(C) Blanket: A "Blanket" can be associated with "Sheet" (a blanket is similar to a sheet), "Coat" (as a blanket can be used for covering), "Ban" (to blanket a ban, meaning to impose broadly), and "Cover" (a blanket is used to cover). This fits all the clues.
(D) Electric: "Electric" does not connect with the clues.
(E) Soldier: "Soldier" doesn’t fit with the clues.
Step 3: Conclusion.
The correct answer is (C) Blanket, as it connects to all four clues.