The format has become an unofficial web standard for documents that require a specific printed format, such as forms that must be filled out by hand and/or signed, and you can rely on most of your users having the capability to view and print this format. a. DOC b. DOCX c. TXT d. PDF

The pdf format has become an unofficial web standard for documents that require a specific printed format, such as forms that must be filled out by hand and/or signed, and you can rely on most of your users having the capability to view and print this format.

Explanation:

Portable Document Format (PDF)

PDF is a well known file format that is used all around the world by millions of users to view, read, edit or print documents. It is based on the PostScript language and can support a variety of features.

The pdf format is also widely used for web applications since a lot of users have the capability to view and print this format.