A double blind study is one in which neither the researchers nor the subjects know which subjects are receiving the real treatment and which are receiving
the placebo. What is the purpose of this design?
A. It postpones the interpretation process,
B. It minimizes subject frustration,
C. It minimizes bias,
D. It prevents researchers from formulating hypotheses.

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.

the  different  of  these  two  are  that  they  differently  handle  their  team.

an  expressive  leader  focuses  on  the  task  at  hand  and  make  sures  that  their  goal  is  achieved.  they  accurately  finish  the  task.  an  instrumental  leader  on  the  other  hand  works  on  the  unity  of  the  group,  they  care  more  about  their  employees.  all  the  while  creating  a  good  environment.