How has the use of social media changed people's writing? A. It is now succinct and brief. B. It now contains longer words. C. It now has a more formal tone. D. It is now wordy and expressive.

A. It is now succinct and brief.

Explanation:

Each social media platform has a different limit of words, these limits are a constant practice to resume and editing ideas, this constant new structure leads to an alternative structure in sentences, abbreviations, contractions, eliminating unnecessary articles.

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A) It is now succinct and brief.