Answer : A Explanation: Branch-and-bound ïƒ Keeps track of all partial paths which can be a candidate for further exploration. Steepest-ascent hill climbing ïƒ Considers all moves from current state and selects the best move. Constraint satisfaction ïƒ Discovers problem state(s) that satisfy a set of constraints. Means-end-analysis ïƒ Detects difference between current state and goal state.