"The space shuttles is the subject."
Simple formula: find the verb of the sentence then ask the question "who or what performs the verb" and the answer to that question is the SUBJECT of that sentence!
In your sentence; ask the question; 
"Who or what have made travel to the International space station convenient and possible?
Answer: The space shuttles (that's your subject)
        
             
        
        
        
Answer:
 it was very low paying, hard, and over glorified 
 
        
             
        
        
        
I think the answer is the second choice; bashing.
        
             
        
        
        
Answer:
why were you punished by him 
if wrong correct me plsssssss 
Mark me brainliest plsss 
 
        
                    
             
        
        
        
Along with excellence, what did the ancient Greeks value and champion in their heroes? the answer is B honor<span />