Avariable definition defines the name of a variable that will be used in a program, as well as:
a. the type of data it will be used to hold
b. the operators that will be used on it
c. the number of times it will be used in the program
d. the value it will hold
e. none of these

A) The type of data it will hold

Explanation:

In most programming languages, a variable must be decalared before it can be used. Variable declarations allows the compiller to make provision of memory space for the variable so the type of data must be defined accordingly with the name of the variable because different data types occuppy different spaces in memory for example

An integer is 32 bit integral value

A char  is 16 bit unicode value

A double is 64 bit floating point value

the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)