The answer to this is C. Modified block
When a blocked number tries to send you a text message, it won’t go
through, and they will likely never see the “delivered” note. On your
end, you’ll see nothing at all. As far as phone calls are concerned, a
blocked call goes directly to voice mail. On your end, you’ll get a
special “blocked messages” folder in your voice mail inbox if they leave
a message, but you won’t get a notification they called.
Answer:
"continuous mode, which delivers constant oxygen-rich flow to the lung model."
Explanation:
https://www.google.com/search?q=Oxygen+in+the+simulation+starts+as+a&oq=Oxygen+in+the+simulation+starts+as+a&aqs=chrome..69i57j69i60.639j0j4&sourceid=chrome&ie=UTF-8
Answer: Option A) De facto standard
Non proprietary standard is also termed as de facto standard.
Explanation: Non proprietary standard is also termed as de facto as when the proprietary standard such as window are widely used, then it becomes de facto standard. When de facto standard is referring in terms of computers, it is an accepted application, design or language standard that is used in industry but not officially recognized.
An example of de facto standard is paper clip ion used in e-mail to represent an attachment.