Read the following context and choose the best option to answer the question.
Context: So we ended up ordering a freakishly large pizza from the restaurant attached to the Best Western , and watching the food Network until Mildred and I were almost half - asleep . Sunday we met up for breakfast in the aforementioned restaurant , and Mom decreed that she wanted to do more sightseeing , she just could n't wear herself out like she had the day before . So we took taxis to the Smithsonian , where we walked through the Natural History Museum and saw the Hope Diamond on display , and Mildred got scared by a mechanical fox under the elephant . ( If you get too close , it starts making noises . )
Question: Why does the mechanical fox make noises when one gets too close ?
Options: 
A. The museum is try to prevent people going near exhibits because the sound would alarm security personnel
B. The museum wants to be playful and give people harmless frights while attending their displays
C. None of the above choices .
D. The museum wants to prevent people getting too close to the exhibition


B