Once a child' s imagination becomes developed, a host of imaginary creatures may torment the child. But this newly developed cognitive capacity may also be used to render these creatures harmless. For instance, a child' s new toy may be imagined as an ally, powerful enough to ward off any imaginary threats. The type of situation described above most closely conforms to which one of the following propositions? ['Some newly developed capacities only give rise to problems.', 'The most effective way for children to address their fears is to acknowledge them.', 'Most problems associated with child-rearing can be solved with a little imagination.', 'Sometimes the cause of a problem may also provide its solution.']