Select the word segment that substitutes (replaces) the bracketed word segment correctly and completes the sentence meaningfully. Select the option 'no correction required' if the sentence is correct as given.
'This must be it, it's the (countryside; might be that is our) holiday home,' she added hopefully.

The correct answer is (b) countryside; perhaps this is our.
Explanation:
"Perhaps this is our" is the correct phrase as it introduces a possibility, which fits the context of the sentence. The original phrase is incorrect in construction. "Might be that is" is awkward and doesn't follow proper English usage.
Meanings of all options:
· Countryside; whenever this is our: Incorrect and does not fit the sentence.
· Countryside; perhaps this is our: Correct, expressing a possibility.
· Countryside; however this is seemed our: Incorrect; poor grammar.
· No correction required: Incorrect, as the original sentence contains errors.