Which of the Following Sets of Constraints Results in an Unbounded

Multiple Choice

Which of the following sets of constraints results in an unbounded maximization problem?

A) X + Y ≥ 100 and X + Y ≤ 50
B) X + Y ≥ 15 and X - Y ≤ 10
C) X + Y ≤ 10 and X ≥ 5
D) X ≤ 10 and Y ≤ 20
E) All of the above have a bounded maximum.