Three different materials are shown in the section view of an object. The upper portion is made of a bronze material and is a horizontal rectangular piece. Under the bronze material, the remaining space is evenly divided vertically with a steel material on the left and a cast iron material on the right. Which of the following is (are) true?
A. If the bronze section lines are drawn at a 45° angle, then the steel and cast iron section lines could be drawn at a 135° angle.
B. If the bronze section lines are drawn at a 45° angle, then the steel section lines could be drawn at a 135° angle, and the cast iron section lines could be drawn at a 90° angle.
C. If the bronze section lines are drawn at a 135° angle, then the steel section lines could be drawn at a 45° angle, and the cast iron section lines could be drawn at a 180° angle.
D. If the bronze section lines are drawn at a 135° angle, then the steel section lines could be drawn at a 45° angle, and the cast iron section lines could be drawn at a 60° angle.
E. none of the above
Answer: D
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