How does the molecular structure of a pesticide affect its bioaccumulation in living organisms?

a) Pesticides with simple, smaller molecular structures tend to bioaccumulate more in living organisms.
b) Pesticides with complex, larger molecular structures tend to bioaccumulate more in living organisms.
c) Molecular structure has no significant impact on the bioaccumulation of pesticides in living organisms.
d) Pesticides with polar molecular structures tend to bioaccumulate more in living organisms than non-polar ones.