<混合題>第47至50題為題組 From (A) to (F) below， choose the ONES that are true for both jackdaws and turtle ants. （多選題，4分） (A) They have special strategies to locate food sources. (B) They have complex interactions led by a leader. (C) They share information with their group members. (D) They establish rules to stay away from enemies. (E) They change their nesting sites from time to time. (F) They show behavior governed by a unique system of communication.
