When it comes to negative public relations, it’s pretty tough to top the sight of a United Airlines passenger being dragged, bloodied and screaming, from a flight. United Airlines management failed to plan for a situation where a passenger refused to get off the plane, and employees made an ad hoc decision to use force. Afterwards, United changed its policies so that employees could follow a better solution in the plans. a, forecastedb, standingc, single- use

standing

Explanation:

As the strategy is considered after the event, the new procedure and policies  of action will take place in future scenarios. They will applied to make a better outcome than without it. This may or not repeat, it is not a "single-use" event. Employees must be prepared when the circumstance arrive to behave propertly in the future

Explanation:

A standing plan is a business plan with an intention to be used many times. It is framed in such a way that it acts as a guide for managerial decisions and actions that tend to be recurring. It is used over a long period, sometimes indefinitely, and is altered as circumstances change. In general, standing plans contain rules, policies and procedures that define actions to take in certain situations or actions that must be completed to accomplish a particular goal. Standing plans contribute to coordination in the business, as they bring about consistency and unity. United used a standing plan as a better solution for handling a passenger that could cause obstruction.

the answer is . a novel has no sub-plot, but a novella does