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 . )

Options are:
1). The museum is try to prevent people going near exhibits because the sound would alarm security personnel;
2). The museum wants to be playful and give people harmless frights while attending their displays;
3). None of the above choices .;
4). The museum wants to prevent people getting too close to the exhibition;
Q: Why does the mechanical fox make noises when one gets too close ?
2).