Internet Search Engine
In the excerpt it shows that the "web navigator" is something that you type "arcane codes and symbols into" and then you are "flooded with fifty thousand incorrect answers". This is exactly what we do now with search engines like Google, Yahoo, or Bing. We type in what we are looking for and in return get a list of possible results, many of which are not what we were looking for. This makes Internet Search Engine the best option.
Answer:
The brain is the most vital organ in the human body because they're more developed than the brains of other animals. However, humans have traits that other animals don't, such as, the ability to think, ability to invent new ideas, and ability to remember.
It seems to me that both A and C are true.
B is false. You really can't assume that your audience knows what text you are writing about.