As a country makes the transition from a least developed economy to developing nation status the Birthrates and Death Rates will increase. Birthrates will increase due to immigration. The healthcare services generally improves when a country develops more and becomes more industrialized. It helps improve the economy which in turn gives more people the opportunity to have more children and to lead healthier lives. So the birth rates go up. Death rates will go up too due to an increase in criminal activity.
I'm pretty sure it's option D
A wage paid based on the ability to sell a product or service is called commission. This is usually given to sales person in particular because they are the one who are facing the clients and trying to persuade them purchase their products of services.
The best and most correct answer among the choices provided by the question is the first choice. On the other hand, the answer for the second question is the second choice. I hope my answers has come to your help. God bless and have a nice day ahead!