Questions: People use to develop a digital identity that reveals their personal philosophy. A. usernames B. internet etiquette C. online reputations D. social media

The answer is D: social media.

Explanation for each option:

A. Usernames: While usernames are a part of one's digital identity, they are typically just a small component and do not fully reveal a person's personal philosophy. Usernames are often chosen for convenience, anonymity, or creativity, but they do not provide a comprehensive view of one's beliefs or values.

B. Internet etiquette: Internet etiquette, or "netiquette," refers to the proper and respectful behavior expected when communicating online. While it is important for maintaining positive interactions, it does not directly reveal a person's personal philosophy.

C. Online reputations: Online reputations are the perceptions others have of an individual based on their online behavior and content. While this can reflect aspects of a person's character, it is more about how others view them rather than a direct expression of their personal philosophy.

D. Social media: Social media platforms are designed for users to share their thoughts, experiences, and beliefs with a wide audience. Through posts, comments, and interactions, individuals can express their personal philosophy and values, making social media a key tool for developing and revealing a digital identity.