A technology that can help a student to increase his or her understanding of the vocabulary used in a classroom is called: a. assistive instruction.
b. UDL technology.
c. hypertext software.
d. adaptive instruction.

c. hypertext software.

Explanation:

In Computer science, a hypertext can be defined as textual informations that are being displayed on a computer system and these texts usually links to other informations (texts) that the user can easily have access to in real-time.

Basically, some developers include encyclopedias and dictionaries in their software database, which makes other necessary informations or contents easier and immediately accessible to the users through the use of hypertexts that is activated by pointing and clicking on the link with a mouse, keypress set or soft touching the screen.

Hence, a technology that can help a student to increase his or her understanding of the vocabulary used in a classroom is called hypertext software.