When you use the keyboard to scroll to a different position in the document, the automatically moves when you press the desired keys.

a. roster
b. alt tag
c. insertion point
d. smart tag

Option C i.e., insertion point is the correct option.

Explanation:

if any user or person scrolls the following contents by using the keyboard from one position to another position in the document of the user then, the insertion point moves automatically without any implementation when the user presses any key they want. If the user clicks on the arrow keys then, it also works like that. So, that's why the following option is correct.

answer; defense;