I want to know the answer to the following question:
What kind of parents did Bell state were more prone to having deaf children?
All the background I'm provided with is that "In his lecture Memoir upon the formation of a deaf variety of the human race presented to the National Academy of Sciences on November 13, 1883 he noted that congenitally deaf parents were more likely to produce deaf children and tentatively suggested that couples where both parties were deaf should not marry.". Is that enough to answer the question?
Answer: yes