The ductility of a specimen can be determined by

A calculating the percent elongation $(\%$EL$)$ from the initial length of the specimen and its final length at fracture

B calculating the percent reduction in area $(\%$RA$)$ from the initial cross$-$sectional area of the specimen and its final cross$-$sectional area at fracture

C using the stress strain curve to find $\%$EL: drawing a line from the point of fracture to the x axis $($strain axis$),$ making sure the line is parallel to the modulus of elasticity; this strain value is the plastic deformation at fracture

D any of the above options