Explanation:

- The marginal propensity to consume (MPC) refers to the change in consumption from a change in income.

- When MPC = 1, it means that all additional income will be spent.

- The multiplier effect measures the total output effect from an initial change in spending.

- Option 1 (Value of the multiplier is 0): Incorrect. If MPC is 1, the multiplier should not be zero; zero means no effect.

- Option 2 (Value of the multiplier is 1): Incorrect. A multiplier of 1 means no amplification; with MPC = 1, all of income is spent, implying a larger effect.

- Option 3 (Value of the multiplier is between 0 and 1): Incorrect. This would imply partially spent income, but with MPC = 1, all is spent.

- Option 4 (Value of the multiplier is Infinity): Correct. Theoretically, if MPC is 1, the multiplier can be infinite due to perpetual spending of all income.