According to one rule of thumb, ______ percent of circuit loading information is easy to gather.

Probing your network for security flaws should occur once a quarter, and a complete audit of your security should be completed ________ per year

a. Once b. Twice c. Three times d. None of the above

____________________ text styles, such as headings, can be used to format table text.

Fill in the blank(s) with the appropriate word(s).