Answer:
A). Punctuation conveys meaning and affects the way text messages are understood.
Step-by-step explanation:
The first statement i.e. 'punctuation...understood' most aptly backs the claim that it is crucial to punctuate the text messages. The punctuation of a text message is directly associated with how it is understood by the receiver as it helps the reader to understand the intended pauses, emotions, or desired emphasis on specific words clearly as intended by the sender. A correctly punctuated text makes the meaning clearer and comprehensible for the reader. Thus, option A is the correct answer.