If the marginal propensity to consume (MPC) is 0.75, what is the value of the multiplier?

The multiplier is calculated using the marginal propensity to consume (MPC) with the formula:

$$k = \frac{1}{1 - \text{MPC}}$$

Given MPC = 0.75.

$$\begin{align*} k &= \frac{1}{1 - 0.75} \\ &= \frac{1}{0.25} \\ &= 4 \end{align*}$$

The value of the multiplier is 4.

Comparing the calculated value with the given options:
A. 2
B. 4
C. 1.33
D. 0.25

The calculated value matches option B.

$$\boxed{\text{B. } \textbf{4}}$$