In a hypothetical country, the population is expected to increase by 25% following recent legislation relaxing the barriers that restrict immigration. It is expected that the new immigrants will purchase the same goods and services as the current population does. If all other economic forces are held constant, how would this increase in population influence demand?.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

Maybe c. im not too positive