What kind of evidence does the writer describe as strongest?

Children who learn in their home language during the first years of school often understand new ideas more quickly, because they do not have to learn the language and the lesson at the same time. In regions where a regional language is spoken at home, some schools therefore begin lessons in that language and add the national language gradually. Critics worry that pupils may fall behind in the national language. Supporters answer that pupils who first read well in one language tend to transfer those skills to another. The debate continues, and the strongest evidence comes from schools that follow pupils over many years.

Answer and explanation

Correct answer: B. Studies that follow the same pupils across many years of schooling

  1. Step 1: The last sentence names schools that follow pupils over many years. Step 2. That is the strongest evidence. Answer: Studies that follow the same pupils across many years. Why not the others: Opinions, single-year scores and teacher surveys are not named as the strongest.

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