Correct Answer: A

Rationale: The correct answer is 'Slang.' Slang refers to informal words or phrases that are specific to a particular group of people, such as young people or a specific culture. In this scenario, the teacher is hearing non-standard words and expressions used by students, which aligns with the definition of slang. Jargon typically refers to specialized terminology used within a specific profession or group. Dialect refers to a particular form of a language that is specific to a region or social group. Vernacular refers to the everyday language spoken by people in a particular region or country.

Correct Answer: A

Rationale: The correct answer is A because it uses a comma to separate the day of the week from the date, as well as a comma after the month when the date is included in a sentence. In choice B, there should be commas after both the day of the week and the date. Choice C correctly uses commas after the day of the week and the date. Choice D incorrectly places the comma before the date instead of after the month.

Correct Answer: D

Rationale: The comma after 'delicious' is unnecessary as it separates the adjective 'delicious' from the noun 'stew'. In this case, 'delicious' is describing the type of stew, so the comma should be removed to maintain correct sentence structure. The other commas in the sentence are correctly used to separate items in a list and after introductory phrases, making them necessary for clarity and grammatical correctness.

Correct Answer: C

Rationale: The correct answer is 'Mood.' Mood refers to the atmosphere or emotional setting created by a piece of literary work. It reflects the feelings and emotions evoked in the reader while experiencing the text. 'Tone' (choice A) refers to the attitude of the writer towards the subject or audience, 'Irony' (choice B) involves a contrast between what is expected and what actually occurs, and 'Theme' (choice D) is the central idea or message conveyed by the text.

Correct Answer: C

Rationale: The correct plural form of 'cactus' is 'cacti' according to the English language rules for forming plural nouns ending in -us. The word 'cacti' is the plural form of 'cactus,' which follows this particular rule. Choice A 'Tomatoes' is incorrect because the correct plural form of 'tomato' is 'tomatoes,' not 'tomatos.' Choice B 'Analysis' is incorrect as it is already the plural form. Choice D 'Criterion' is incorrect as its plural form is 'criteria,' not 'criterion.'