For a steel thick-walled cylinder subjected to external pressure, which of the following statements is incorrect? (A) Ra

[answerhappygod]

For a steel thick-walled cylinder subjected to external
pressure, which of the following
statements is incorrect?
(A) Radial stress increases in magnitude from the inner surface to
outer surface.
(B) Radial stress and hoop stress all very nonlinearly through the
wall thickness.
(C) Hoop stress increases in magnitude from the inner surface to
outer surface.
(D) Hoop stress is compressive through the wall thickness.