we are supposed to find 
The expression that completes the statement to form a true inequality

Here 

So the given inequality to be true the value of the option(s) should me bore than 39
First option: 

As its not more than 39. Hence its not the correct option.
Second Option : 

Hence this is the correct option so,

Third Option: 

As its not more than 39. Hence its not the correct option.
Fourth Option: 

As its not more than 39. Hence its not the correct option.