Third-party advertisers sometimes use web bugs to collect information about website visitors, such as the time and date the user viewed the webpage.

Column headings are often longer than the numbers in the column below. To overcome this problem, text can be ________ to keep the columns relatively narrow

Fill in the blank(s) with correct word

The read and write heads of an SSD

A) Touch the surface of the disk while reading and writing data, which is why the heads get dirty B) Float a few millimeters above the surface of the disk C) Spin around a stationary disk D) Are nonexistent