Technological Change. First radio broadcast of Message: President Calvin Coolidge, 1923. First television broadcast of Message: President Harry Truman, 1947.
Answer:
The correct answer is C. Xander has not yet attained object permanence.
Explanation:
According to Piaget's Stages of Cognitive Development, object permanence occurs during the <em>Sensorimotor Stage (birth- 2 years old)</em>, in which an infant understands that an <em>object is still there even if it cannot be seen. </em>
In this case, Xander has not yet obtained object permanence since as soon as the rattle is taken away, for him it has <em>ceased to exist</em>, thus making him be interested in other stimulus.
Well, with better meds, we are able to cure bad diseases that people may have, for technology, we can send communication from a long distance for help.
It deals with opportunity costs. Opportunity costs are not real costs, but rather the things that you had to give up in order to obtain something else. What you didn't obtain is considered to be an opportunity cost. A production possibility curve deals with this.
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Workers were drafted, so they had to join the war and leave or quit their jobs. People also volunteered to serve, and so people who didn't get drafted or join, took their places.
