Lean young adults...
A...The conclusion is not categorical...its only says "can".. so the
argument is not really proving the truth of the conclusion..
B...Nowhere is it mentioned that lean young adults are the ONLY condition
to have a longer life.
C..There is no underlying cause...one is said to cause the second...
D...again..there is no categorial statement that LEAN YOUNG ADULTS is
the ONLY condition for a unusually long life.
E...i think E is best...not everyone who is lean will necessarily live longer..