The correct option is D.
Generally, scientists have to communicate the results of their investigations with other scientists and they do this by publishing their works in scientific journals. Other scientists have to evaluate the published work in order to verify that the investigation has been properly conducted. Other scientists will critically look at the procedure of the work in order to determine it is correctly done and to see if the results obtained are valid. It is only when the results has been declared valid by other scientists that the work will become acceptable in the science community.
