Which sentence is a grammatically correct way to answer this question?

1. ¿Toman Isabel y Teresa el metro al centro histórico?

The correct answer is number 1. Isabel y Teresa lo toman el metro al centro histórico.

Explanation:

The correct sentence is the third one: Isabel y Teresa lo toman al centro histórico. This sentence is grammatically correct because in Spanish, when a direct object is a definite article like "el metro" or "el centro histórico," it becomes "lo" for singular masculine nouns and "los" for plural masculine nouns. Since "metro" is singular in this case, the correct form is "lo toman" for Isabel y Teresa. So, the correct translation of "Isabel y Teresa take it to the historic center" would be "Isabel y Teresa lo toman al centro histórico."
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