In mild forms, an intellectual disability results from a genetic factor alone. The Option D is correct.
<h3>What is an
intellectual disability?</h3>
Basically, an intellectual disability refers to a condition that limits a person’s ability to learn at an expected level and function in daily life. Levels of intellectual disability vary greatly in children. It is an impairment of the cognitive functioning, characterized by having an IQ of less than 70, given the average IQ is 100.
Some of the most common types of intellectual disabilities includes an autism, Down syndrome, fragile x syndrome, fetal alcohol syndrome, Prader-Willi syndrome etc.
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