Answer:
A, C, and D
Explanation:
The correct options would be options A, C, and D.
Science is generally defined as the systematic study of both the physical and natural world. The subject of science is classified into two, namely:
Understanding the natural world is achieved by observations and experiments. Scientists follow the scientific methods to explain phenomena. The methods involves a logical and rational order of steps including observation, hypothesis formulation, testing of hypothesis by experiments and making conclusions based on the outcomes of the experiment.
Observations leads to questions being asked and this eventually leads to formulation of hypothesis. Science practice is not limited to scientists alone. Several laymen practice science, albeit unconsciously.