Answer:
Developmentalists determined that: (A) Fluid intelligence does decline; however crystallized intelligence holds steady and can improve
Step-by-step explanation:
This theory of intelligence classifies two types of intelligence, based on the processess each one requires. Fluid intelligence is about being able to reason, to make predictions or asumptions, to make logical connectios. This intelligence does not involve previous experience, or studies.
While by the other hand there is crystallized intelligence, they state elderly people developed this type of intelligence because of previos experience, acumulation of knowledge. This is a type of intelligence that is cultivated in time and does is why it can impove.