Identify a true statement of a javascript program in a web form.
a. javascript intercepts the content of the form before the browser attempts to contact the cgi script and report whether the data contained in the survey form has been correctly filled out or not.
b. javascript is a closed-source programming language, which provides tools and a programming environment for communicating the strategy and overall administration of distributed applications.
c. javascript is extracted by all layout engines in a similar way; as a consequence, this grounds consistency in terms of functionality and interface.
d. javascript is a bug-free visual basic scripting language, which is used only for networking applications.