A project manager uses manual filing systems, electronic text databases, and project management software to manage his project. These are examples of what?

option D is most likely be the answer. 

b. Information retrieval systems is my option

thanks for invition ,,,,,,,,,, my choice is option B

Information Distribution Systems.

i think this is an example of Project Records. The files is the information systems to implements the project design and follow the instruction thru management.

Information retrieval systems.c. Project records.d. Information distribution systems.

I think option D will be the apt answer, because Informations Distribution system covers other three options, communication is established, informations are stored and retrieved and more so again distributes for execution

Correct Answer is  B

Project data is put into a variety of retrieval systems. These are not necessarily distribution systems but are storage and retrieval systems.

i think that the right answer is 

c. Project records