In Problem 8, If a = 2

Multiple Choice

In Problem 8, if a = 2.10, b = 1.10, and c = 1.20, the marginal products of x₁, x₂, and x₃ (in this order) are

A) all increasing.
B) decreasing, increasing, and decreasing.
C) all decreasing.
D) increasing, decreasing, and constant.
E) all increasing if A > 1.