Why could it cause problems when students learn in a language that their parents don't speak
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Explanation:

Because the first teachers of a student is their parents. If the parents can't speak a language, it means that the student also don't know that language because they learn from their parents. So, it creates a problem when students learn in a language that their parents don't speak.

well, number 1, the 1920s was not economically prosperous until the start of the lend-lease act, which employed large amounts of people in producing equipment for the allies.

b. world war ii is your answer, because wwi had already ended at 1918, and the cold war was after 1945.

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the answer is b ik this because i ahd this in a quick quiz