TOEFL Reading: ETS-TOEFL阅读机经 - Q17UD4V62KWKH8W2L$

According to the hypothesis discussed in paragraph 7, why would a meerkat choose to stand guard once it has eaten? A. To look for new foraging grounds as well as predators B. To protect itself from being attacked by a predator C. To improve its position within the group D. To warn others in its group of any predator attacks, even at great risk to itself