Which of the following is correct character encoding declaration in HTML5?

In network HA measurement, what is the meaning of five nines?

A) Five out of every nine networks fail. B) Five out of every user's computers is unavailable for access. C) The network should experience 99.999 percent uptime. D) Five out of every nine network administrators are always available to take care of their network problem.

An O(n(logn)) algorithm has _____ efficiency.

A. linear B. logarithmic C. linear logarithmic D. quadratic