26. The mean-end analysis process centers around the
detection of difference between the current state and the goal state. Once such
a difference is isolated, an operator that can reduce the difference must be
found. But perhaps that operator can not be applied to the current state. So a
sub-problem of getting to a state in which it can be applied is set up. The
kind of backward chaining in which operators are selected and then sub goals
are set up to established the precondition of operators is called
(A) backward planning
(B) goal stack planning
(C) operator subgoaling
(D) operator overloading
ANS-(C)
Description is coming tomorrow---
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