Jane, the CEO of a company, is trying to resolve how a new marketing strategy should be conducted. She is taking into account the long-term future of the company, brainstorming with her team, and providing them all with key information. Which type of decision-making style is she using?

conceptual decision making

Explanation:

In simple words, Conceptual type decision-making identifies individuals who appreciate the uncertainty with open-ended choices and are inspired to have an influence on the environment. If you're a visionary type decision-maker, you ’re supposed to have day-dreams sometimes and easily come up with fresh suggestions when necessary.

Thus, from the above we can conclude that Jane is using conceptual decision making.

d. all of the above are true.