Answer:
The correct answer is a. testing the artifact for its age.
Explanation:
The correct answer is A because the role archeologists is to determine how old certain object is through the process of excavation. They are determining from which period it is and what is was used for.
B is not correct because students cannot conclude the age of certain object without certain scientific knowledge.
C is also not correct because the comparison sometimes cannot be achieved and also it cannot always lead us to conclusion about certain items.
D is not correct because it is not enough to describe an object. It is necessary to find a suitable usage for it.
