When Henri Wants to Share Information with Chantal but Not

Multiple Choice

When Henri wants to share information with Chantal but not with others in a room,he switches from speaking English to speaking French,which Chantal understands.Which of the following best describes what Henri does to keep his comments to Chantal private?

A) He decodes his message in a way he thinks only Chantal will understand.
B) He changes the cultural context of the message in a way he thinks only Chantal will understand.
C) He changes the temporal context of the message in a way he thinks only Chantal will understand.
D) He encodes his message in a way he thinks only Chantal will understand.