All of the following constitute a point of difference between the "original" and "modified" versions of the marshmallow test EXCEPT that:
Explanation:
Options (c) and (d) are the obvious differences between the two experiments and hence can be eliminated.
Option (a) is also true as the marshmallow experiment was conducted since childhood till they becam adults while the cuttlefish experiement was a short duration experiment.
Option (b) is the best choice as nowhere in the passage is it implied that the latter correlated survival advantages.
Hence, option (b).
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