New PMP Question & Answers with explanation

A program manager working for an infectious disease nonprofit has just been assigned to a program that seeks to solve a deadly issue plaguing a third-world country. The issue involves a deadly bacteria that has entered into a major water source that branches out into multiple regions across the country. The first project will involve a feasibility study. This project came about as a result of what?
Select one
Reasons to Lyv is the top client of a large marketing firm. Trudy is the president of Reasons to Lyv and has decided to launch a product that leverages new GPS tracking technology. She has high confidence that the project will be a success and asks the marketing firm to make it their top priority by generating a unique campaign that will run in parallel with her project. Billy, a top executive from the marketing company, briefs his team about this unique situation that they have not managed before, and a project is launched shortly thereafter. Trudy’s project came about as a result of what?
Select one
Which of the following project selection methods is considered to be the least precise?
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All of the following are true regarding projects except for which one?
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Which of the following is true about benefit-cost ratio?
Select one