Which of the following statements about autism spectrum disorder is incorrect? a. exposure to environmental pollutants such as mercury has been linked to the development of this disorder. b. genetic factors appear to play a prominent role in the development of this disorder. c. it is characterized by a pervasive pattern of inattention and/or hyperactive and impulsive behavior. d. this disorder involves feeling overwhelmed and sad for extended periods of time.

The correct option is: D. This disorder involves feeling overwhelmed and sad for extended periods of time

Explanation:

Autism spectrum disorder is a type of neurodevelopmental disorder, characterized by restricted and repetitive behavior, activities or interests; difficulty in paying attention, social interactions and hyperactivity.

The risk of autism spectrum disorder increases if one has a family history of autism. Exposure to environmental metal pollution like aluminium, lead, mercury may also induce autism spectrum disorders.

Therefore, the statement D. This disorder involves feeling overwhelmed and sad for extended periods of time, is incorrect about autism spectrum disorder.

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.