(Figure: Understanding Phillips Curve Shifts) The graph shows two Phillips curves. Suppose the economy originally faced curve PC1. Which of these would cause the curve to shift to PC2? 
Definitions:
Calories
Units of energy that food provides, commonly used to quantify the energy intake from consuming food and beverages.
Correlation
An index measuring the degree of association between two or more variables.
Kilograms
A unit of mass equal to 1,000 grams, and is the base unit of mass in the International System of Units (SI).
Linear
describing a relationship or phenomenon that follows a straight line, often used in the context of functions or equations.
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