ANSWERS EXPLAINED

1. B. Although persons with all degrees of intellectual disability (answer A) can require some support to function in the community, those with a mild intellectual disability are able to hold a job (thus making answer E wrong). Individuals with moderate intellectual disability (answer C) are often able to manage small amounts of money and make change. Persons with severe and profound intellectual disability (answer D) have limited abilities to manage themselves and have difficulty learning skills necessary for keeping a job. 

2. C. Although each of the conditions listed is associated with intellectual disability, the largest percentage continues to be attributed to idiopathic causes. 

3. B. This description refers to a person with moderate intellectual disability. Refer to Table 1–2 for descriptions of the various degrees and functionality of persons with intellectual disability.