For symmetric structures and symmetric loads. Which of the following conclusions is correct? ( )

A、Theaxialforce,shearforceandbendingmomentonthesymmetricsectionmustbeequalto0.;
B、Theaxialforceandbendingmomentonthesymmetricsectionmustbeequalto0,andtheshearforcemaynotbeequalto0.;
C、Theaxialforceandbendingmomentonthesymmetricsectionmaynotbeequalto0,theshearforcemustbeequalto0.;
D、Theaxialforce,shearforceandbendingmomentonthesymmetricsectionmaynotbeequalto0.