Your vessel has a midships engine room and the cargo is concentrated in the end holds．The vessel is（）.

A.sagging with tensile stress on main deck

B.sagging with compressive stress on main deck

C.hogging with tensile stress on main deck

D.hogging with compressive stress on main deck

美国国会的2013财年国防授权法案中，呼吁美向台湾出售先进的F－16C／D战机或类似机型，这严重损害了中美战略互信。美国此举（）

A.体现了主权国家享有平等权

B.体现了主权国家享有自卫权

C.违背了不干涉他国内政义务

D.违背了联合国集体协作原则