The most important ways of preserving the Glorious Qur'ān by Sahǻbah include
establishing schools in major cities and teaching the Glorious Qur'ān
teaching the application of sunnah practically
explaining the conduct of the prophet according to the Glorious Qur'ān
guiding the new converts in Islam ways of life
Correct answer is A
Establishing islamic schools where students can Learn and be taught more about the glorious Qur'an, helps in preserving the glorious Qur'an.