Which sentence is written correctly?

1. A mother and two children become one of those victims.

2. A mother and two children become those victims.

Obviously the first sentence is wrong because three people can't be considered "one."

The second sentence is correct in some contexts. However, the past tense -- became -- would be used in most sentences.

Marvin went to the arcade, he was ready to play retro video games.

To determine which sentence is written correctly, we need to look at the subject-verb agreement.

In sentence 1, "A mother and two children become one of those victims," the subject is "a mother and two children." Here, the verb "become" is indicating that the subject (mother and two children) is plural. However, the phrase "one of those victims" implies that they are only one victim, which contradicts the plural subject. Therefore, this sentence is not written correctly.

In sentence 2, "A mother and two children become those victims," the subject is still "a mother and two children," and the verb "become" agrees with the subject by remaining in the plural form. Additionally, the phrase "those victims" matches the plural subject. Therefore, sentence 2 is written correctly.

Overall, sentence 2, "A mother and two children become those victims," is the correct sentence.