Passage Summary: For a group of countries to be powerful in global politics, they must act aggressively. This only happens if every single member thinks a problem is serious, and they only think it's serious if it hurts their money. Therefore, the EU won't be powerful in this way.

Conclusion: Not all member countries of the European Union will be strong in foreign policy.

Reasoning: Strength in foreign policy requires an aggressive response, which requires every member to perceive a problem as grave, which in turn requires every member to agree that the problem threatens the alliance's economy.

Analysis: This argument is built on a conditional chain: Strong Foreign Policy -> Aggressive Response -> Perceive as Grave -> Agree on Economic Threat. The conclusion is a 'Not' statement (Not Strong FP), which in formal logic is the 'then' part of a contrapositive. To make this conclusion follow logically, we need a premise that triggers the chain's collapse. Look for an answer that guarantees the EU countries will not all agree that a problem threatens their economy, as this would prove they won't be strong in foreign policy.