I think the it is B hope that helps
Answer:
practice effects
Explanation:
Based on the information provided within the question with regards to Leigh's experiment it can be said that her biggest concern should be practice effects. This term refers to the effects or changes that can occur when repeating the same experiment various times with the same participants. Which is what Leigh is doing, as she is only changing one variable but repeating the same experiment.
If you have any more questions feel free to ask away at Brainly.
Answer:
parties and drinking and also the war ending
Explanation:
The answer is a. Change state boundaries
