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 150 units
B)decrease by 150 units
C)increase by 100 units
D)decrease by 100 units
E)increase by 50 units