Two colleagues develops a project task together. Colleague one prefers to write down ideas and processes before doing the actual work. Another colleague prefers to directly work which it is concise and lively. Their personal work style differences lead to a clash between them and affect the normal conduct of the project. Who should solve this problem responsibly ?
A、The Project Manager
B、 The Human Resources Manager
C、 The project Sponsor
D、 The Functional Manager