New PMP Question & Answers with explanation

The project you are working on has an increase in cost effectiveness, increased productivity and increased morale. What might be the reason for these changes?
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Aii the following are used in quality management except?
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Project has faced major difficulties in the quality of its deliverables. Management now states that quality is the most important project constraint. Lf another problem with quality were to occur. What would be the best thing for the project manager to do?
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In quality terms, one of the meanings of “out of control” is:
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Your customer requested that the new railroad cars you are building for his company be constructed from heavy grade aluminum. After reviewing the requirements, two of your experts inform you that the customer would be better off with steel cars. You meet with the customer to discuss the issue, and he directs you to go ahead with the aluminum cars. What should you do?
Select one