The Two-Factor Model Created by Charles Spearman (1972) Is Best

The two-factor model created by Charles Spearman (1972) is best described as:

A) intelligence activities that share a single common core known as the g factor while the s factor is responsible for unique aspects in the performance of any given task.
B) intelligence activities that comprise factors known as primary abilities (e.g. spatial, perceptual, numerical, etc)
C) intelligence activities focusing on more perceptual aspects including fluid intelligence and crystallized intelligence.
D) None of the above