Chomsky's ideas are often linked to the Critical Period Hypothesis (CPH), the hypothesis that animals, including humans, are genetically programmed to acquire certain kinds of knowledge and skills at specific times in life. Based on Chomsky's theory, identify three correct statements from the four ones below, then choose one alternative (from a to d) in which those statements are all included.

I. Beyond those Critical Periods, it is not difficult or impossible to acquire those abilities.

II. The CPH suggests that, regarding language, children who are not given access to language in infancy or early childhood will never acquire language if this deprivation goes on for a long time.

III. The innatist perspective is partly based on the CPH theory.

IV. It is difficult to find evidences against CPH, since nearly all children are exposed to language at an early age.

The only correct affirmatives are