Why would the size adjustment factor decrease as member size increases in wood? a)- the larger the member, the less impact load has on that given member. b)-the larger the member, the higher the probability of imperfection within the material. c)- the larger the member, the less critical bending stress becomes. d)- the larger the member, the bigger the tree has to be before being harvested; therefore, it is a green initiative to reduce the harvesting of large trees.