What do you mean by a soil model being able to model "elastic $-$ perfectly plastic" soil behaviour?

Note: Select only one answer

Both elastic and plastic strains can be captured, except that the latter is more perfectly captured than the former

Elastic strains can be captured less precisely as compared to plastic strains

It considers both elastic and plastic strains but the plastic strain is limited to a specific failure value only

It considers elastic strains more accurately than plastic strains