Given QM output on a product-mix problem as below:

Objective: Maximize

Results ----------

X1 X2 RHS Dual

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Maximize 40 50

Material A 1 2 <= 40 16

Material B 4 3 <= 120 6

Material C 2 7 <= 300 0

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Solution 24 8 1,360

Which material(s) is (are) scarce resource(s) in the production?

		Material A.
		Material B.
		Material C.
		Material A and Material B.
		Material B and Material C.
		Material A and Material C.
		All the three materials are scarce resources.
		All the three materials are excessive resources.