help please 1.Use the sentence to answer the question. We are excited for summer vacation, for we have plans to visit several national parks. Which comma rule is used in the sentence? (1 point) a. compound sentence b. items in a series c. appositive d. long introductory element 2.What is an appositive?(1 point) a. a word or group of words that renames a noun b. a phrase of four words or more that begins a sentence c. a series of three or more items d. a sentence of two independent clauses 3.How is ownership shown for singular nouns?(1 point) a. add -'s to the noun b. add -s to the noun c. add an apostrophe if the noun already ends in -s d. add -es to the noun 4.What is one purpose of quotation marks?(1 point) a. to indicate when someone is speaking b. to separate two independent clauses c. to show an author's narration d. to end a complete thought