A hard currency is a currency that is widely accepted around the world for trade and financial transactions. Key characteristics include: - Stability in value over time, even during periods of economic uncertainty. - High liquidity in foreign exchange markets, meaning it can be easily bought or sold without significantly affecting its price. - Backed by a strong, stable economy, sound monetary and fiscal policies, and a reliable political system. - It is typically convertible into other currencies without significant restrictions. - Option A is incorrect; abundance doesn't guarantee hardness (e.g., a hyperinflating currency could be abundant). - Option B accurately describes the stability and liquidity of a hard currency. - Option C describes a fixed exchange rate, not a hard currency; hard currencies often float but are stable due to underlying strength. - Option D is incorrect; hard currencies are typically convertible and are the basis for SDR valuation.