Final answer:
The main advantage of using a standardized test is the ability to compare results across different individuals due to consistent scoring and interpretation.
Step-by-step explanation:
One key advantage of using a standardized test is that it allows for the comparison of results across different individuals. In contrast to option A and B, the main benefit of standardization is not about tailoring the test to individual takers or informing them about specific content beforehand, but rather ensuring that the scoring and interpretation are consistent, thereby making the results comparable across a wide range of participants. This benefit, option C, aligns with the core purpose of norming and standardizing tests like the Stanford-Binet Intelligence Scale.