Macbeth probably committed some acts of sin.  
        
                    
             
        
        
        
The answer is c
They both claim there love for who she is
        
                    
             
        
        
        
Well, you need to give us the choices before we can give an exact answer but normally you can evaluate the tone by thinking about the context and meaning.
some examples of strong disapproval might be: "She's such a horrible person" or "I really hate this lamp it's ugly" The bolded words show the strong disapproval.
But most likely you should be able to find it by evaluating tone.
        
             
        
        
        
This quote means that whenever you are not feeling happy just have a smile on your face.