Atomic radius atomic number ionization energy and then electronegativity
        
             
        
        
        
 c. 
Explanation:
I mainly think its c. from my point of view because as yoy can see they showed observations and explained certain information and they didnt conclude it as it's TRUE they said theories meaning its and Idea and something that is not fully proven happend.
 
        
             
        
        
        
Answer:

Explanation:
              2C₄H₁₀ + 13O₂ ⟶ 8CO₂ + 10H₂O
n/mol:      4.3  
13 mol of O₂ react with 2 mol of 2C₄H₁₀

 
        
             
        
        
        
I just need points I hate my sister