Which psychologists have identified various defense mechanisms that allow us to reduce anxiety caused by stressful situations or our own shortcomings?

Animal studies on early sensory deprivation

A) confirm that even extreme deprivation is reversible as long as it occurs in the first year of life. B) verify the existence of sensitive periods in brain development. C) refute the existence of sensitive periods in brain development. D) cannot be generalized to human brain development.

Lev Vygotsky's long life enabled him to advance his theories and become influential in the field of child development

Indicate whether the statement is true or false.