RATIOCINATION: LOGIC ::

A． peripheral element
B． commencement
C． conviction
D． affliction
E． gratuity

A． Scientists have ruled out the possibility that the appendix is involved in hindgut fermentation in all species, including rabbits.
B． As an organ, the appendix is more useful to the immune response of human beings in their first development than later in life.
C． The human appendix contains greater amounts of lymphoid tissue than the aggregates of which that are found in other areas of the gastrointestinal tract.
D． The appendix in a human child is generally less well developed than the appendix in a human adult.
E． The presence of the appendix in humans suggests that the human digestive process resembles the rabbit digestive process more than that of other animal species.