Speech on pollution in the environment or speech on bullying

What did mark twain contribute to the history of the novel? select all that apply.

Use a pronoun to refer to two or more singular antecedents joined by or or not

Which is the most accurate definition of a clause? a) a clause is any group of two or more words. b) a clause is a group of words with a subject and a verb. c) a clause is a group of words with a subject and a verb that can stand alone. d) a clause is a group of words with a subject and a verb that cannot stand alone.