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

Sarah and joe are arrested for allegedly stealing computer equipment. which of the following is correct? the trial would only begin and end in the state court system in the state where the crime is alleged to have happened. the trial would begin in a state-level appellate court and go to the federal court of appeal if the verdict is challenged. the trial would begin in a state-level court of original jurisdiction and go to a state appellate court if either side appeals the case. the trial would begin in a u.s. district court for the circuit and go to the u.s. supreme court if either party challenges the verdict.

The process of rocks breaking down and becoming other rocks

1.how is germany's economic system similar to that of the united kingdom a.both are free-market economic b.both are command economic c.both are mixed economic d.both are traditional economic