One of the Primary Obstacles for Cross-Border Mergers and Acquisitions

One of the primary obstacles for cross-border mergers and acquisitions is:

A) the regulatory requirements that must be met in each country that is the domicile of a firm involved in the merger or acquisition.
B) deciding which currency that two firms that do not use the same currency will use after the merger or acquisition is completed.
C) consolidating the separate identities of the firms involved in the merger or acquisition into a single identity.
D) integrating the overlapping product lines of the firms involved in the merger or acquisition.