The Major Disadvantage of the Data-Based Approach to Identifying Middle-Level

The major disadvantage of the data-based approach to identifying middle-level abilities is that it:

A) focuses on observable behaviour and ignores the cognitive processes that contribute to intelligence.
B) does not distinguish between fluid and crystallized intelligence.
C) cannot identify middle-level abilities that are not already measured by intelligence tests.
D) occasionally identifies middle-level abilities that do not correlate highly with specific abilities.