conclusion :: since M- lions have their forelimbs developed they have to climb into their mother's pouch
since this is an assumption question use assumption negation technique::
option a)All animals that are born after a short gestation period are not born with some parts of their bodies underdeveloped- does not weaken the conclusion , move on ..
b)[color=#80FFBF]Well developed forelimbs would not have been more advantageous to ancient marsupial lions than well developed hind limbs would have been[/color
]-does not weaken the conclusion
c) If the newborn marsupial lion did climb into its mother’s pouch, then paleontologists would be able to find evidence of this fact
- out of scope again
d) Newborn marsupial lions that crawled into their mothers’ pouches could have done so had they not had only their forelimbs developed at birth-this is a bit complicated to comprehend so simplify
- so this says that M-lions have only their forelimbs developed at birth and they could have only climbed into their mother's pouch if they had more than their forelimbs developed , so basically they say that M-lions cannot climb into their mother;s pouch
e)Newborn marsupial lions would have had only their forelimbs developed if this development were of no use to the marsupial lions
-simplify-if this developed is of no use then they don't have to climb into their mother's pouch , since this developement is useless it serves no purpose , so this contradicts the argument and i think this should be the ans.
" What [i] do is not beyond anybody else's competence"- warren buffett
My Gmat experience -http://gmatclub.com/forum/gmat-710-q-47-v-41-tips-for-non-natives-107086.html