What word is best to substitute for the underlined words in the following sentence? Could Kendra manage to carry both Kendra's books and yours?
Correct Answer: D
Rationale: In the sentence, 'Could Kendra manage to carry both Kendra's books and yours?', the possessive pronoun 'hers' is the best substitution for the underlined words. The use of 'hers' correctly indicates possession by Kendra, making it the most appropriate word choice to replace 'Kendra's books'.
Choice A, 'her', is incorrect as it refers to the possessive form of a singular female noun, not being possessive of 'Kendra'.
Choice B, 'his', is incorrect as it is the possessive pronoun for a singular male noun, not suitable for replacing 'Kendra's books'.
Choice C, 'she's', is incorrect as it is a contraction for 'she is', which does not fit the possessive context needed in the sentence.