Some labs use eyetracking cameras and software to track people's eye movements as they read a page or screen of material.

?Some designers propose the use of _____ in which all measurements are expressed relative to the default font size using the em unit.

A. ?liquid layouts B. ?fixed layouts C. ?fluid layouts D. ?elastic layouts

How can you make tcsh always display the pathname of the working direc- tory as part of its prompt?

What will be an ideal response?