_______ is a mobile, Web-based study application used by half of all high school students and one-third of all college students in the United States.

A) Brainly
B) Dropbox
C) Google Docs
D) Quizlet

Web-Based

Applications or services that are accessible over the internet using a web browser, without requiring any software installation on the user's device.

Quizlet

is a learning platform that allows students to study various topics via learning tools and games, primarily through flashcards.

High School Students

Individuals enrolled in secondary education, typically between the ages of 14 and 18, preparing for higher education or employment.