Answer: C. Grow the tree in a pot and measure the mass of the soil before and after the tree grows to a certain height
Explanation: When testing an hypothesis, which is a prediction of the outcome of an experiment, it is vital to keep all other factors, that can affect the outcome of the experiment, constant; so that any outcome can be attributed (or disregarded) to the variable being tested.
In this case, the variable being tested is the soil, and so all other factors such as water, air, sunlight, etc. should be kept constant.
Opium, which some 12,000 people were addicted to. Sometimes, instead of eating, people would eat opium and thrive on it. BTW Opium is a powerful and bad drug.
B. The wealth status of a new individual persons
I think the answer would be B. Early mycenaean civilization was based on oligarchy political rule. This type of government is lead only by a small group of people. This civilization was being lead by a group of elite warriors. So, it should be oligarchy.
