Answer:
D. Political parties
Explanation:
Washington was notorious for his view against political parties.
Washington wanted the people in government to unify under a single cause :To improve  the general well being of all citizens.
He believed that political parties generally only work for the interest of their supporter base rather than for the benefit of the people as a whole. He believed, this is dangerous for the unity of the nations.
 
        
             
        
        
        
Answer: norepinephrine
Neurotransmitters are chemical messengers in the brain that are the means by which brain cells communicate with each other. New drugs like venlafaxine are called <em>serotonin-norepinephrine reuptake inhibitors</em>, and their function is to target two main neurotransmitters: serotonin and norepinephrine, which are the main neurotransmitters associated with depression.
 
        
             
        
        
        
Answer:
Following the formula  
 
where  ΔX= changes in the quantity of berths
and  ΔY= changes in the price of fuel 
The result is that after a 4% increase in the price of fuel, the quantity of berths will decrease in 8.6%.
Explanation:
Cross-Price Elasticity is the result of the division between the porcentual changes in quantity of the good X (in this case berths) against porcentual changes in the price of good Y (in this case the price of fuel). In this case they are complementary goods, and an increase in one will decrease the quantity of the other.