Please help me i really need it this is my last question​

Self contained sequences of actions to be performed are? a. expressions b. algorithms c. functions d. formulas

In 2009 to 2010, how many social network users were reported as being victims of online abuse? a. 1 in 10 b. 100% c.1 in 100 d. 50%

What does the hard disk drive do? it stores all of the information on a computer. it controls a computer’s operating system. it enables visual interaction with a computer. it contains all of a computer’s internal parts.