BGP (Border Gateway Protocol) is the standard protocol used to exchange routing information between different autonomous systems on the internet, making it the appropriate choice for a router that needs to communicate across different ASs. OSPF and EIGRP are typically used for routing within a single AS (intra-domain routing), hence they would not be suitable for this scenario where inter-domain routing is required. RIPv2, although capable of dynamic routing, is generally considered outdated and insufficient for the scale and complexity of multinational corporation networks.