This is the answer , and I am so sure.
D. It's up to you to decide what to do.
Possessive noun usually includes an apostrophe such as Nene's bear, plant's soil, earth's mass and a lot more. Therefore, the possessive noun in the new coat belonging to Sharon is Sharon's that is Sharon's new coat. Add 's to those singular or plural nouns that do not end in s however, add only an apostrophe to plural nouns that already ends in s. Moreover, possessive nouns can be personal pronouns too. Personal pronouns actually shows or displays ownership of something especially in a sentence plus it does not the 's form of the word. Possessive pronouns inlude we, mine, her, his, ours, theirs<span> and a lot more.
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<span>A. He welcomes them enthusiastically.
He tells them that they are welcome to his home for at least a month, and hopes that they will stay longer. It is clear that he respects Don Pedro and is happy to house the soldiers, even Don John, in his home for as long as they want to stay.</span>
The answer would be the last one, leave it as is. B and C change the meaning of the sentence entirely, while A sounds unnatural and is too verbose.
Hope this helps! :)