The core concept here is to identify indicators of economic optimism. The correct answer is 'B. Rise in home prices' because it reflects a stable or growing market, which is often associated with economic prosperity and consumer confidence. 'A. Increase in savings rate' could indicate uncertainty or preparation for economic downturn. 'C. Decline in consumer spending' suggests economic pessimism. 'D. High unemployment rate' is a clear sign of economic distress, not optimism.