Suppose that an argument's conclusion is supported by a single statement, which is in turn supported by another statement, which itself has yet another statement supporting it. Which argument pattern would best represent this reasoning pattern?

The argument pattern that would best represent this reasoning pattern is called Complex Argument Pattern

Step-by-step explanation:

When an argument has its main conclusion (A) to be directly supported by (B), and (B) is in turn supported by (C), it indicates a complex argument structure or pattern. Since statement (B) is acting as a premise for the statement (A) but happens to be the conclusion of statement (C), then (B) is seen as an intermediate conclusion.

Complex Argument like this are best written in a simple form called standard form.