I think it’s loan A because as the other guy said it makes sense
The answer is: his study does not qualify as an experiment. For the study to be an experiment, Dr. Kline would have to manipulate the independent variable in a group (for example, apply a certain treatment) and also have a control group to which he doesn’t apply such treatment.
In this case, the study is an observational study because he only observed the subjects that were in the zoo that morning and measured the variable of his interest, that is the environmental attitude of the visitors, he did not apply a certain treatment to the group nor manipulate any variable.
One of the greatest military tactical strategy that the Allied Powers of USA, Great Britain, and Russia have done in the second world war was that they decided to infiltrate Germany and Italy first, and it would be followed by Japan's defeat in the Pacific. It was mainly because they thought at that time that "Adolf Hitler is more dangerous than the emperor of Japan."
Answer:
education is the key of life
It discriminated society into groups of various levels. it changed the equalitarian view of people into a discriminatory sense of judging people around them.