Which of the following types of intelligence would psychologists predict to continue to increase for as long as a person remains active and alert?

A) fluid intelligence
B) crystallized intelligence
C) g factor of intelligence
D) progressive matrix intelligence

Crystallized intelligence involves the acquisition of knowledge and skills through experience and education, and it is expected to continue to increase as long as a person remains active and alert. In contrast, fluid intelligence, which involves abstract reasoning and problem-solving, tends to decline as we age. The g factor of intelligence is a measure of general intelligence, which also tends to remain relatively stable over time. Progressive matrix intelligence is a specific type of fluid intelligence test that may show some improvement with training but is still subject to decline with age.