In 732 C.E Charles Martel's troops defeated muslims in france and for over 700 years, the Byzantine empire held on to Constantinople and a good position of Balkans. The effect this caused was that it prevented Islam from expanding into western Europe. Option A is correct.
Islam is an Abrahamic, monotheistic, universal religion preaching that there is only one God, and that Muhammad is the messenger of God.
Islam teaches that God is merciful, all-powerful, and unique, and has guided humankind through prophets, revealed scriptures and natural signs.