What type of thinking would a young adult use to make decisions about ambiguous problems that might have multiple solutions?

Critical thinking.

Explanation:

Thinking is a cognitive activity you use to process information,solve problems,make decisions and create new ideas.Thinking is use when you want to make sense of experience, organize information,ask questions,make plans or on decision on what to do.

On making decisions about ambiguous problems that might have multiple solutions, critical thinking is the best type of thinking to use.Critical thinking refer to the ability to exercise careful evaluation or judgement in order to determine the authenticity,accuracy,worth,validity or value of something.In addition to precise, objective analysis,critical thinking involve synthesis,evaluation,reflection and construction.

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

the answer is true .