Answer:
The correct answer is option d. 
Explanation:
The production of Acetyl-CoA takes place by the dissociation of both carbohydrates and lipids in the process of glycolysis and beta-oxidation. It then moves into the TCA cycle in the mitochondria and combines with oxaloacetate to give rise to citrate.  
In the given case, no labeling will be found in the acetyl-CoA. The labeled C3 and C4 carbon of glucose signify the carboxyl carbon of pyruvate. In the succeeding reactions of the transformation of pyruvate to acetyl-CoA, the carboxyl carbon gets lost in the form of carbon dioxide. Thus, acetyl-CoA does not comprise any labeled C3 and C4 of glucose.  
 
        
             
        
        
        
1 you run out of fuel 2 it takes a long time 3 it’s hard to get back 4 the conditions are constantly changing making it harder to predict what could happen. Look at Apollo 12 as a example
        
             
        
        
        
1.Most aquatic animals have fins or paddles that help them swim
2. Skin is usually slippery and soft
        
             
        
        
        
Blood enters the pulmonary vein with close to 100% of the blinding site for oxygen saturated. 
        
             
        
        
        
Heated waste water product from production plants :(, natural gas plants, nuclear plants, textile or paper industries