When the concept of universal primary education was introduced

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When the concept of universal primary education was introduced, education _______.

was given free to all

was intended for all the sexes

focused on imparting skills

was intended to leave out female learners

Giải thích

Đáp án Β
Từ nội dung trong câu: "The concept of universal primary education, regardless of sex, had been born, but it was still in the realm of the single-sex school." (regardless of sex: bất kể giới tính gì)