Consider a material that exhibits elastic compressibility and is a standard solid (three-parameter solid) under multi-dimensional distortion. Find the creep Poisson function ( v_c(t) ). Discuss key characteristics.
a) ( v_c(t) = 1/3 )
b) ( v_c(t) = 0 )
c) ( v_c(t) = 1 )
d) ( v_c(t) = t² )