Creep of concrete is assumed proportional to the stress if the stress does not exceed .......of the characteristic compressive strength

Creep of concrete is assumed proportional to the stress if the stress

1.	Creep of concrete is assumed proportional to the stress if the stress does not exceed .......of the characteristic compressive strength
A.	15%
B.	20%
C.	25%
D.	33%
E.	50%
Answer» E. 50%