Cuando es algo que sige pasando no nomas un dia pero cada dia y cuando te asen burla or te pegan
Answer: This is a "CONTROLLED PLACEBO EXPERIMENT".
Explanation: A controlled placebo experiment is a type of research method that is used to check the effectiveness of a drug in a patient. This is done by selecting a sample group, then randomly divide the two group into a placebo group ( this are the group that will receive the drug treatment ) and the controlled group( these are the group that will receive a coloured mixture that looks like the drug, but does not have any effect). Without the groups knowledge about the real drugs and the coloured mixture, but are followed up and tested.
This is a controlled placebo experiment, because 400 student has been choosed as the sample, and are divided into a placebo group and a controlled group, to check the effectiveness of a drug on their memory.
Encouraging free trade between countries and helping countries negotiate trade conflicts are two most important jobs of the World Trade Organization. Most countries in the world are members of the said organization.
The answer would be letter D. World Trade Organization.
