The correct answer is C :)
Irregular plural nouns are nouns that do not become plural by adding -s or -es, as most nouns in the English language do. ... The plural form of woman is women, not womans. There are hundreds of irregular plural nouns, and in truth, you must memorize them through reading and speaking.
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Answer:
A polish army unit grew so fond of a pet bear that they enlisted the animal in the army in order to bring him aboard a military ship