Answer:
The effect of abstinence on Abner’s cognitive abilities was that his Cognitive ability was equal to that of nonsmokers.
Step-by-step explanation:
Cognitive abilities are defined as the skills based on brain which is used to carry out tasks ranging from simplest to most complicated.
The cognitive ability concerned with the ability to observe, learn and problem-solving ability based on observation and learning rather than actual knowledge on that subject. The cognitive abilities can be improved with the improvement in lifestyle and proper practice.