Analytical skill allow a manager to be able to make a problem apart and determine where the snag is.
Step-by-step explanation:
Decision making:
Though it looks like closely matches, this skill enable people to take decision on various choices by analyzing its pros and cons. So this option goes invalid for the given situation.
Analytical:
This is the right choice. Analytical ability allows the person to analyze the problem, find the root cause and suggest possible solution.
Conceptual & Technical skill: These both are related to Technical aspect. But the given situation is based on the soft skill aspect.