C. None of these
it's the oxygen cycle which the option isn't available
Maybe they were seperated at birth? or one dyed their hair or had gray hair at a younger age than usual
Answer:
D. The quantity of data will lead to a better understanding of the extent of the problem.
Explanation:
The more the data collected the better the understanding of the extent and cause of the problem.
Answer:
The control group consists of elements that present exactly the same characteristics of the experimental group, except for the variable applied to the latter. This group of scientific control enables the experimental study of one variable at a time, and it is an essential part of the scientific method.
