Answer:D) Cross-functional team
Explanation: Cross functional team is the cluster of people who form the group ,persisting various expertise of functions to pursue a common objective. It is usually a common mechanism of organization where different employees are hired to complete a project at their own level.
The people involved in this mechanism can be human resource department people, operation section people,finance people, project development employees etc.Thus ,Barclays should also use this technique for his company .
Other options are incorrect because line organizational model and line and staff organizational model are simple model for organization and employees monitoring and supervision.Matrix organization model representing company structure and relation in matrix format.Thus the correct option is option(D).