The war started after one country () another country.

The war started after one country () another country.

• A. Attacked
• B. Declared
• C. Invaded
• D. Fired

Answer: (A)

The action that starts a war is a direct act of aggression by one country toward another, so the best choice is a straightforward verb that captures that immediate cause-and-effect moment. Attacked fits perfectly because it clearly describes one country pressing an assault on another, which commonly leads to war. It’s a natural, grammatical fit with the rest of the sentence: “The war started after one country attacked another country.” Invaded could work in some contexts, since invading involves entering and occupying territory, but the sentence as written is better served by the more general term attacked, which covers a broader range of aggressive actions. Declared would require a different structure—usually you declare war on a country, not declare a country. Fire, on its own, isn’t idiomatic here; you would say fired at or fired on, which doesn’t fit the given wording as cleanly.

The action that starts a war is a direct act of aggression by one country toward another, so the best choice is a straightforward verb that captures that immediate cause-and-effect moment. Attacked fits perfectly because it clearly describes one country pressing an assault on another, which commonly leads to war. It’s a natural, grammatical fit with the rest of the sentence: “The war started after one country attacked another country.”

Invaded could work in some contexts, since invading involves entering and occupying territory, but the sentence as written is better served by the more general term attacked, which covers a broader range of aggressive actions. Declared would require a different structure—usually you declare war on a country, not declare a country. Fire, on its own, isn’t idiomatic here; you would say fired at or fired on, which doesn’t fit the given wording as cleanly.