Ronald is a farmer. he has been cultivating corn on the same piece of farmland for many years. after every four planting seasons, he leaves his land unplanted to it recover its fertility. which type of agriculture is ronald practicing?
a. shifting cultivation
b. plantation farming
c. sedentary tillage
d. organic farming

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. 

Cbecause they dump truck