_____ is a means of acquiring data about a group of people (such as location, noise level, and pollution levels) through sensor-enhanced mobile devices.?

What key combination helps to secure the logon process?

A. Windows+R B. Ctrl+Shift+Esc C. Ctrl+Alt+Del D. Alt+F4

Which of the following CSS3 properties configure the alignment of text within a table?

a. align b. caption c. text-align d. border-spacing