The internet is the world's most popular computer network
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True

Explanation:

Indeed, the internet is the world's most popular computer network. We can make this assertion because it is estimated that about 2 billion people worldwide are connected to the internet.

Why the internet is widely used today springs from the fact that it is:

roses are red,

violets are black,

for what you said,

i hope you sit on a big fat tack.

i think it may be b, i'm not exactly too sure on this. but b seems to make more sense.