The answer is Tranquilizer.
Nembutal is a barbiturate which is a sedative, barbiturates are non-selective central nervous system depressants. It is lethal in high doses. A tranquilizer/sedative is a sleeping pill but are also used as an anti-anxiety drug as they have calming effects on patients, however taken in high doses can result in accidental/purposeful death. 
 
        
             
        
        
        
<span>One of the main tools used by Ivan III was his trickery in the diplomatic process by forging treaties he had no intention on keeping. He arranged a very important marriage to Sophia that forged his claim to the throne. He also used diplomacy to weaken the mongols in the west and in the east.</span>
        
             
        
        
        
The correct answer would be option D, How has the law affected immigration in the United States. 
Jamie is writing a research paper on whether to revise the immigration and Nationality Act of 1965. The above mentioned question would be the best example of an effective research question. 
Explanation:
When there is a research being conducted, it should cover all the effects, advantages or disadvantages or impacts, the research topic had on a particular area. 
When a research like whether to change the immigration and Nationality Act of 1965 is being conducted, the question should be to see how the law has affected the immigration in United States. This question will tell the researcher about the need of any changing in the Act or not. 
Learn more about Research Work at:
brainly.com/question/4332567
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Answer: renewable energy
Explanation:
Renewable energy is energy that is collected from renewable resources, which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.