Solution:
It is use as the scientific method to make testable explanations and predictions about the world. A scientist asks a question and develops an experiment, or set of experiments, to answer that question. Engineers use the engineering design process to create solutions to problems. 
Both have the clearly defined steps are as follows: 
State your question Define the problem 
Do background research Do background research 
Formulate your hypothesis, identify variables Specify requirements 
Design experiment, establish procedure Create alternative solutions, choose the best one and develop it 
Test your hypothesis by doing an experiment Build a prototype 
Analyze your results and draw conclusions Test and redesign as necessary 
Communicate results Communicate resul 
 
Thus the right answer is A.