Answer:
The most correct option here is B
Step-by-step explanation:
Models are usually used in science in order to proffer or explain difficult concepts of the real/actual "subject". The model to be used must have some level of similarity (usually high) with the actual subject. The use of model helps to explain how certain things work in the actual subject. Actual subjects are sometimes eventually used later after convincing experiments (showing "positive" results) must have been done on the model.
From the explanation above, it can be deduced that the correct option is B