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QUESTION 4 Consider this utility function: " _x 0.5, 0.5. What does the income offer curve look like? O A. It is the 45-degree line. O B. It is a positively-sloped linear line. It could be the 45-degree line or not. O C. It is a horizontal line. O D. It is a vertical line. O E. Il is a positively-sloped function. It could be a non-linear curve