In a geometric diagram, ∠A and ∠B are complementary, and they form a straight line with ∠C. If m∠A=x°, m∠B=(2x)°, and m∠C=90°, what is the measure of ∠B?(1 point)

Responses

180°
180 degrees

60°
60 degrees

30°
30 degrees

90°
90 degrees
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