In a window that carries the performance label "HS- C30 71 × 59," the letter C indicates that the window
A)is a C- grade window.
B)is a casement window.
C)belongs to a performance class called commercial.
D)none of the above.

Question

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The Answer of In a window that carries the performance label "HS- C30 71 × 59," the letter C indicates that the window
A)is a C- grade window.
B)is a casement window.
C)belongs to a performance class called commercial.
D)none of the above.

In a Window That Carries the Performance Label "HS- C30