I don't know. There are no answer options. Maybe palm trees etc.?
They could influence the result by (<span>d.) replicating each treatment, including the control.
In researching something unknown, we never know what factors that might influence a certain occurrence. One way around this is to keep changing all the treatment and control on research subjects in order to find out which factors that gave out consistent results</span>
The D. internal rate of return (IRR) <span>is the discount rate that equates the present value of the cash inflows with the initial investment.
This term refers to the profitability of a potential investment, meaning that it will show you how much an investment costs, and how much money you can possibly earn by predicting its future price and cost. It can also show you whether it is sensible to invest in something. </span>
Answer: MARIJUANA
Explanation: MARIJUANA has been known to have different names such as Herb,pot,ganja etc. Many countries of the World have placed Ban or strict regulations to control the use of Marijuana.
MacCoun and Reuter were former staff or RAND,they discovered that a one percent Increase in price will lead to a decrease in demand for Marijuana,which means the demand for Marijuana is elastic. They also proposed that a decrease in consumption should be applied in the regulation instead of Banning the usage of a psychostimulants like Marijuana.