Answer:
The correct answer will be option-D.
Step-by-step explanation:
The scientific method is used to answer the scientific questions which involve sequential steps. The first step of the method is making an observation which is performed using the sensory organs of the body. The observation compels human to become skeptical and ask questions.
The observation step of the method could be performed by observing and making the sketches, taking pictures, taking careful measurements and keeping it as evidence using a scientific method like holotype in taxonomy which is kept as evidence.
Recording the measurement becomes part of collecting data after the experiment which could be analysed. Therefore, option-D is the correct answer.