In the given question, the sentence is divided into three parts I, II, and III. For each part, an alternative statement is also given. You have to determine if a part requires a correction and then mark that as your answer.

The economic disagreements have lead / to higher tariffs for both nations, as well as / concerns of the strength of their security partnership.

I. The economic disagreements have led

II. to higher tariffs for both nations, as well as

III. concerns about the strength of their security partnership.