Currency's Domestic Purchasing Power

Steps:

• Identify the question: It asks for the term describing a decrease in what a currency can buy within its own country.
• Recall definitions: Inflation erodes money's buying power through rising prices; other terms relate to price levels or exchange rates.
• Match to choices: Rule out exchange rate terms (B, C) as they concern foreign value, not domestic.
• Confirm: Domestic real value fall aligns with sustained price increases.

Why D is correct:

• Inflation is defined as a general rise in prices, reducing the real value of currency domestically by decreasing its purchasing power.

Why the others are wrong:

• A. Deflation is a fall in prices, increasing currency's real value.
• B. Devaluation applies to fixed exchange rates, lowering currency value against foreign currencies.
• C. Depreciation refers to a floating exchange rate decline against foreign currencies, not domestic value.

Final answer: D