Jack wants to test whether runners on his cross-country team improve with his new training regimen. He measures their run times at the beginning of the season and again at the end of the season. Runners in Jack's study improving their times due to running generally and not necessarily due to the new regimen is an example of which of the following threats?a. Selection
b. Maturation
c. History
d. Instrumentation

Is even more difficult to analyze because of the lack of cues in computer mediated communication.

On this map, the state of georgia is in which section of the map?

1. how did conditions in germany and europe at the end of world war i contribute to the rise and triumph of nazism in germany? 2. how did the german government under nazi rule build support among the german people? 3. how did nazi germany gradually isolate, segregate, impoverish, and incarcerate jews and persecute other perceived enemies of the state between 1933 and 1939? 4. how did the nazis lead germany to war in europe and, with their collaborators, kill millions—including systematically murdering six million jewish people? 5. why is learning about the holocaust important? so we don’t repeat history.