How does the marginal propensity to save (MPS) differ from the average propensity to save (APS)?

• A. MPS measures total savings relative to total income, while APS measures the change in savings relative to a change in income.
• B. MPS and APS both measure total savings relative to total income.
• C. MPS and APS both measure the change in savings relative to a change in income.
• D. MPS measures the change in savings relative to a change in income, while APS measures total savings relative to total income.

Answer: (D)