An American project management company with an established office in Chile has won a large contract issued by the state-sponsored rail company to increase rail use in the country and improve the rail interface with other South American rail lines. The company brings in several rail specialists from the US and Germany to assist with engineering activities related to tunnels and loading spurs. What modes of service provision is this company using?

a. Modes 1 and 2

b. Modes 1 and 3

c. Modes 2 and 4

d. Modes 3 and 4