The RCM means Reliability Centered Maintenance. This is a tool used to make sure that the inherent design reliability of a process . It has a lot more functions too. what i have stated above are just some of the examples. It should look similar but actually it would be a totally different.
They were important because they made up a part of what is going on today, Hope this helps :)
The answer is true becuase it starts out explaining that it's been raining for three days.
Answer:
southwestern part of the United States
California, Nevada, Wyoming, Utah, Colorado, New Mexico, and Arizona