You get a text. It is a reminder from your dentist’s office that you have an appointment tomorrow. It says to type “1” to confirm or “2” to cancel the appointment. You accidentally type a “3” and nothing happens. How could the input validation be improved?

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

Aisha has finished working on a word processing document that contains 15 pages. she has added some special elements in the first three pages, page 9 and 10, and page 15 from the document. she wants to print only these pages to see how they look. which option is the correct way to represent (in the print dialog box) the pages that aisha wants to print?

Which cultural aspect does this type of song best portray? a german polka dance