Why differentiate hoop versus meridian stress resultants in thin spherical stadium shells?

Choices

• (A) Membrane action funnels hoop tension at perimeter rings and meridian compression near crown ridges
• (B) Domes shear like planar trusses uniformly
• (C) Meridional hoops vanish whenever shells are clad with metal decking
• (D) Wind uplift negates curvature so shells flatten