HUMAN AND ANIMAL COMMUNICATION

In the left hand column are some human linguistic expressions. On the right are some animals, who have their own communicative expressions. Click on the controllers under the pictures to hear the animal expressions.
Some human expressions Some animal expressions
Wow! 
Nuts! 
Woops! 
Yum! 

WHICH OF THE FOLLOWING FEATURES DO THESE HUMAN EXPRESSIONS SHARE WITH THE ANIMAL EXPRESSIONS?

a. They are communicative events (in contrast, say, to the sound made in producing a sneeze).

b. They are calls that communicate messages to other members of the species.

c. They have the feature of arbitrariness.

d. They are unitary expressions which cannot be analyzed into smaller meaningful units.

e. All the above.