D. Because its not the only measurement which says in a. Its not B because waist measurement is also important. and its not C since D is the perfect method
        
             
        
        
        
Answer:
tina.left(90)
Explanation:
In code if you want your character to turn left you put "left" in your code and if you want your character to go right type "right" and so on and so on so your answer is tina.left(90)