Which of the following Thinkfree Office component allows you to create a presentation program?

Which of the following Thinkfree Office component allows you to create a presentation program?
 
(a) Write
 
(b) Calc
 
(c) Show
 
(d) All of the mentioned
 
I have been asked this question in quiz.
 
My question is based upon Online Office Systems topic in portion Productivity Software and Webmail Services of Cloud Computing