How does the template “P.R.
E:P.” work in an impromptu speech? In this pattern, you . Then , and . Finally, . ① share the primary reason or reasons② conclude by summarizing your central point again③ start off by clearly stating your point④ offer an example where your main point is supported
选项：

A:③①④②;
B:④③②①;
C:③④①②;
D:①④③②