Refer to the information provided in Figure 31.1 below to answer the question(s) that follow. 
Figure 31.1
-Refer to Figure 31.1. Which of the following causes the ppf to shift from ppf2 to ppf3?
Definitions:
Residual Standard Deviation
A statistical measure that quantifies the amount by which an observed variable differs from its estimated value.
Sharpe's Measure
A risk-adjusted performance metric that measures the excess return per unit of deviation in an investment asset or portfolio.
Residual Standard Deviation
A measure of the amount by which each observed value in a data set differs from the average of those values.
Beta
A measure of a stock's volatility in relation to the overall market; a beta greater than 1 indicates higher volatility than the market, while a beta less than 1 indicates lower.
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