Functions use arguments and operators, perform calculations and return a value.
I guess the best option is letter D.
In 1972, Gordon Bell formulated Bell's Law, which states a new computer class forms roughly each decade establishing a new industry.
<span>Little circles located in front of various website screen options, which can be selected with the mouse, are called radio buttons. The radio buttons are graphical elements which enable the user to choose one option from several given. It is characterized as a circle and is used when the website visitor should choose one option.</span>