Our country is spiritual country, theirs ...... religious.

This question is about subject-verb agreement. Subject-verb agreement means the verb in a sentence must agree in number (singular or plural) with its subject. The sentence starts with "Our country," which is singular. Therefore, the verb needs to be singular. Let's look at the options: A. "is" - This is a singular verb. B. "are" - This is a plural verb. C. "also" - This is an adverb, not a verb. D. "have" - This is a plural verb. Since "Our country" is singular, the correct verb is "is". The complete sentence would be: "Our country is a spiritual country, theirs is also religious."