Answer:
sorry bro I am also confused and lost after this question 
 
        
                    
             
        
        
        
The correct answer is A) It improved trade between countries by making it easier to ship goods.
How did building this canal promote economic activity?
It improved trade between countries by making it easier to ship goods.
Located in Panama, in Central America, the Panama Canal is an impressive work of engineering opened in 1914, after a long history of ups and downs to get this massive construction finished.
It was the French engineers who started building the canal in 1880. But in 1902, the government of Theodore Roosevelt negotiated with the French and paid them $40 million for the canal. At that time, this territory belonged to Colombia, that is why the United States supported the independence of Panama. After this happened, the United States was granted the operation of the canal until 1999, when the US gave the canal back to the government of Panama. 
 
        
                    
             
        
        
        
Answer: The correct Answer is B.F. Skinner.
Explanation:
B. F. Skinner is considered to be one of the most influential figures in the field of psychology of the 20th century. He was the precursor of the principle of reinforcement which is one of the key elements of the concept of operant conditioning.
Skinner considered and tested that all human actions "including the act of thinking" were directly influenced or were consequences of previous actions. Hence, human behavior is learned. 
In this particular case, the text suggest that human beings have developed certain response tendencies and that we demonstrate certain consistent behavior patterns. In other words, that we learn to behave in particular ways which as we can see is one of the main ideas of B. F. Skinner.