Standard English is characterized by which of the following?

Standard English is characterized by being accepted wherever English is spoken and understood. This form of English is typically employed in formal settings, such as literature, education, and professional communication, and aims for clarity and mutual understanding across different regions and contexts. It adheres to established grammar, punctuation, and vocabulary norms, which helps facilitate effective communication among speakers from diverse backgrounds.

In contexts where English is used internationally, standard English serves as a common linguistic ground, allowing people from various places to understand one another effectively. This universality is a key feature distinguishing standard English from dialects, colloquialisms, and regional variations that might have different accepted norms and usages.

The other choices highlight aspects that do not define standard English as effectively. While it is true that regional variations and slang exist within the English language, standard English aims to minimize these differences to allow for broader comprehension. The idea that it lacks a universal set of rules contradicts its definition; in fact, standard English is governed by a specific set of rules that make it distinct from non-standard forms. Lastly, while standard English can be used in informal contexts, it is most often associated with formal communication rather than primarily informal use.