D. all of the above
hope this helps
<span>Yes, It is true that many automobile companies are making a custom vehicle for physically challenged people. For example, a Hand Controlled Car which is suitable for physically challenged or disabled people. These offer complete customized solutions for car conversion for physically challenged people.</span>
Satisfaction in economic terms is the benefit that an individual gains from consuming a given amount of goods or services.
Maximizing satisfaction means receiving the most benefits with relatively few costs.
There is also additional bit of satisfaction, or amount of utility, gained from each extra unit of consumption. This is called a marginal utility.
The implementation in psychology is most successful when the person could be able to tackle one habit at a time, where in, the person could focus in each and to effectively use this method in quitting the person's habits. The implementation has the capability of helping an individual in modifying his or her behavior and habits to reach their goals.
