Which of the following about the anti-viruses tools can't be inferred from the passage? A.Usual
Which of the following about the anti-viruses tools can't be inferred from the passage?
A.Usually companies, when making an anti-virus tool, will have to think how to make their product effective in the far future.
B.The most difficult thing for programmers is that their tool will be able to kill the viruses expected to plague computer in the coming year.
C.More viruses will come into being at a greater speed than they do now.
D.When people evaluate an anti-virus tool, they will consider whether it will be profitable.