a) it can be invoked manually as object.JSON()
b) it will be automatically invoked by the compiler
c) it is invoked automatically by the JSON.stringify() method
d) it cannot be invoked in any form

Answer: c
Explanation: A common use of JSON is to exchange data to/from a web server. When sending data to a web server, the data has to be a string. In that case json.strigify() is used to convert a javascript object into a string.