I believe the answer is 3. Class system
The class system in social studies context refers to the system to determine social rank that based on achievement and personal merits
The status that Kelly's family get in the society is based on their hard work in handling the dealer car business
Geographers use the five themes to help them study the world and organize ideas.
Many people believe that Columbus was born in Spain
<span>2/3 of the House of congress is necessary to approve a proposed amendment</span>
The correct answer is B. Regional discrepancies might be associated with low socioeconomic status, which is considered a risk factor. Attention Deficit Hyperactivity Disorder or shorter (ADHD) is one of the most common neurodevelopmental disorders in children. The symptoms include difficulty staying focused and paying attention for a longer periods of time, difficulty controlling behaviour and hyperactivity. The origins of ADHD are complex and multidimensional and combine environmental factors such as the socioeconomic status, institutionalized care, and exposure to violence or trauma during childhood, and ofcourse genetic factors.