Discussion
What is conflict directed backjumping?
Answer: C
Plain backtracking undoes the most recent assignment even when it had nothing to do with the failure, whereas backjumping returns directly to a variable in the conflict set and skips the intervening irrelevant work. Forward jumping, restarts and fixed step backtracking are different techniques. Undoing the decision that actually caused a failure, rather than the most recent one, is an idea that reappears in satisfiability solvers as conflict driven learning.
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