When building a dialog within the IBM Watson Assistant service, what does the dollar sign $ represent?

When building a dialog within the IBM Watson Assistant service, what does the dollar sign $ represent?
A . Shorthand syntax for accessing the dialog context.variable_name.
B . The $ syntax is meaningful when used with the asterisk * for building and utilizing JSON within Watson dialog response
C . Describes replacement of context by user_response within the Watson Assistant dialog
D . Replaces a word or set of words in the position the $ occupies

View Answer

Answer: C

Explanation:

Reference: https://console.bluemix.net/docs/services/assistant/dialog-build.html#dialog-build