New PMP Question & Answers with explanation

Nubs and Bits is a Seattle-based company that produces healthy snacks for dogs of all sizes. Its latest project involves creating a snack for large breeds that takes up to one hour to consume. The project manager, who has managed multiple projects for Nubs and Bits over the past five years, decides to build a prototype. What value do prototypes provide?
Select one
Which of the following describes the spectrum of the Conscientiousness domain included in the Big Five personality assessment?
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Which of the following reflect characteristics of Agile teams?
Select two
Within a predictive life cycle, which of the following serves as the basis for estimating costs?
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A project manager liked to hold meetings on a weekly basis with his team members. These meetings resembled brainstorming sessions, where ideas were generated regarding existing risks and project issues. The project manager never struck down any idea and, instead, attempted to foster an environment where creativity, innovation, and sharing of ideas were encouraged. What type of leadership style does this project manager use?
Select one