Which of the following is not a compound word

A．the ability to adjust one's behavior in light of the behavior of others
B．one's awareness that there is safety in numbers
C．the degree of stability one can create in one's immediate environment
D．the accuracy with which one can predict future events

A．Adult female wasps are capable of storing sperm.
B．Female wasps lay their eggs in the larvae of other insects.
C．The adult female wasp can be fertilized by a male that was hatched in the same larva as herself.
D．So few male wasps are produced that extinction is almost certain.