If you are talking about Napoleon Bonaparte then here:
the first mistake was the Continental System which killed more of his empire. (the Continental system was a blockade that stop the trade between Britain & Europe BTW)
the second mistake was the invasion of Russia. this one is common because the weather was cold and it was hard winter. The french were little uneducated in military.
the third one is the peninsular if i am correct. Napoleon took out the Spanish king and replaced him with his brother. the Spanish got mad and Spanish fought french which lead napoleon to take another look at Spanish. 
hope i helped this is all from my head :D
        
             
        
        
        
Answer:
Cohort study
Explanation:
Cohort study: The cohort study is defined as a longitudinal study that takes a sample of cohort that performs a cross-section at different intervals concerning time.
In this context, the cohort is known as a particular group of individuals who incorporates a defining character, usually those individuals who have accomplished a specific event in a particular period, like birth order. 
Cohort study comes under the observational studies. 
Example: In the question above the researcher wants to identify the impact of cholesterol on the development of heart disease.
 
        
             
        
        
        
The correct answer is Switzerland. I believe it was first documented there
 
        
             
        
        
        
The correct answer would be, her ability to speak more than one language.
Joni is applying for a position at a local hospital as a receptionist. The above mentioned statement would have the most impact on her ability to do her job. 
Explanation:
Hospital is a place where people from everywhere come. These people may belong to different social classes, different backgrounds. Local hospitals are visited by people from the surrounding areas as well. They might interact in their local languages. 
So if a person is sitting on a reception, where people will come and interact at first place, then that person on the reception must be able and capable enough to interact with those people in their local language. 
So when applying for a position at a local hospital as a receptionist, a person's ability to speak more than one language would have the most impact on the ability to do the job.
Learn more about Hospitals at:
brainly.com/question/13342548
#LearnWithBrainly
 
        
             
        
        
        
A. Ida B. Wells 
He urged African Americans to protest by refusing to ride street-cards, to stop buying from white owned stores and only buy from black owned stores