Answer:
Explanation:
The theory of G-factor (abbreviation for General factor) was proposed by Charles Spearman in 1904. According to this theory, Spearman stated that g-factor is responsible for all the cognitive intelligence or mental abilities. He asseted that g-factor is the fountain from which springs forth every aspect of intelligence. It is a variable that helps to assess the overall intelligence.
For better understanding of the concept let me state an example. According to Spearman's G-factor theory, if one is good in, for instance vocabulary, then the person will be good in reading and writing as well.
From the given options the correct statement regarding g-factor is the second option and the third option.