Answer:
sry but I don't know the answer
Answer:
Mainframes (also called "big iron")[1] are powerful computers used for large information processingjobs. They are mainly used by governmentinstitutions and large companies for tasks such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing. Mainframe computers are specially used as servers on the World Wide Web (WWW). They are distinct from supercomputers.
Highlight the row(20), then click on the insert cells button under the home ribbon.
The radio buttons are used when only one option is to be selected from the several possible choices. Thus, option A is correct.
<h3>What are radio buttons?</h3>
Radio buttons can be understood as the elements of selection a single option amongst the multiple suitable options. The default icon for the radio buttons is the blank circle.
Therefore, option A Radio buttons is correct.
Learn more about radio buttons, here:
brainly.com/question/14316393
#SPJ1