Why is the OSI reference model useful a. because it provides troubleshooters a shared frame of reference.

b. because it can be applied to a network to solve anything that goes wrong

c. because it means all network equipment is built to the same standard
d. because the OSI creates standards that network engineers need

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 of these is most responsible for differences between the twentieth century to the twenty-first century?

Me and category do i put them in because this is science