D) the law of increasing costs.
If this child has not yet achieved object permanence, <u>she will not look for the cheerio</u>: Option A is correct.
According to the fundamental concept of developmental psychology, object permanence describes the ability of<em> a child to know that objects continue to exist even though these objects cannot be heard or seen physically.</em>
When a child has not yet achieved object permanence, it means they have <em>not reached the stage to know that objects can continue to exist </em>even though these objects cannot be heard or seen physically
Based on this, a child that a cheerio was hidden from him/her no matter the position of such object will <u>not bother to look for the Cheerio</u> since they have not reached the stage to know that objects can continue to exist.
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President Ronald Reagan rejected the theory of Keynesian economics, this theory proposed by John Maynard Keynes, embodied in his work General Theory of Employment, Interest and Money, published in 1936 in response to the Great Depression of 1929, the central principle of this school of thought is that state intervention can stabilize the economy, Keynesianism is one of the best-known economic theories, its main characteristic is that it supports interventionism as the best way out of a crisis and as a mechanism to stimulate demand and regulate the economy in times of depression.
