To answer this question, you need to know the expansion of the acronym CHAT commonly used over the Internet.
Let's go through each option to understand why it is correct or incorrect:
Option A) Conversational Hypertext Across Technology - This option is correct as it accurately expands the acronym CHAT.
Option B) Conversing Hypertext Across Technology - This option is incorrect as it uses the gerund form "conversing" instead of the adjective form "conversational."
Option C) Conversational Hypertlanguage Across Technology - This option is incorrect as it introduces a non-existent term "hypertlanguage."
Option D) Conversational Hypertext Against Technology - This option is incorrect as it uses the preposition "against" instead of "across."
The correct answer is A) Conversational Hypertext Across Technology. This option is correct because it accurately expands the acronym CHAT.