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Explanation:
Although he married a deaf woman, a former speech pupil, Mabel Hubbard, Bell strongly opposed intermarriage among congenitally deaf people. BellĀ feared "contamination" of the human race by the propagation of deaf peopleĀ even though most deaf people statistically are born to hearing parents.He said that marriage between two Deaf individuals posed a threat of a deaf-mute variety of the human race. Because one of his reasons was that he thought that two deaf people could produce of deaf child which is not the case because more than 90% of deaf children are born to hearing parents.