The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt________________?

A. Patients judgments regarding their own state of health may be related to their gender age social class and ethnic group
B. The sick role may be more applicable to people experiencing short-term illnesses than those with recurring long-term illnesses
C. Even simple factors such as whether a person is employed or not seem to affect willingness to assume the sick role
D. all of the above