Multiple Choice
Mario sees popcorn and pretzels as perfect substitutes. He is always willing to substitute 3 cups of popcorn for 1 cup of pretzels. His indifference curves for popcorn and pretzels are _____, and at the optimal consumption bundle his marginal rate of substitution of popcorn for pretzels is _____.
A) right angles; 3
B) right angles; 0.33
C) straight lines; 3
D) straight lines; 0.33
Correct Answer:

Verified
Correct Answer:
Verified
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