Answer:
The correct answer is:
e)All of the above
Step-by-step explanation:
In general, scientific research is based in an skeptikal point of view, therefore all the answers are included in the answer to this question due to the fact that a scientific research has to be tested several times in order to confirm its validity and reliability. Besides, it is also necessary to make sure, especially when the experiment involves products or treatments that are wanted to be released in a direct contact with the social context, they have to be tested several types by others in different conditions under several analisis and points of view. Finally, not only one or few scientists are due to prove the answers are the best currently possible, but many of them must certify the information about it.