By the president
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The Speaker of the House would begin presidency.
C. memory loss can be permanent
The correct answer is 1. display rules.
Display rules is a term describing informal rules about the way, the time and the place that a person should express and communicate his/her emotions. These rules are not set since they differ greatly depending on the culture and the society. In this example, Jessica showed exaggerated excitement when hearing about her friend's engagement. This is because according to the display rules these were news that should make her very happy.
This study was called <span>B. the Minnesota Twin Study. This study began as a twin registry for twins born in Minnesota in 1936-1955. It later on expanded and reached 8,000 pairs of twins for psychological study. The most notable discovery is that personalities of twins are more influenced by their genes rather than their environment. This was due to the similarities between twins who were separated at birth.</span>