Alexandra consumes only caviar and champagne, but she does have a limited income of $400. Her current consumption choice is 5 ounces of caviar, at a price of $50 per ounce, and 6 bottles of champagne, at $25 each. The last ounce of caviar added 100 units to Alexandra's total utility, while the last bottle of champagne added 75 units. If Alexandra chooses 4 ounces of caviar and 8 bottles of champagne instead her total utility will:
A. increase by 100 units
B. decrease by 150 units
C. increase by 50 units
D. decrease by 100 units
E. increase by 150 units
Answer: C
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