I'll focus on three main parts : ____, our products in Europe; 15. the new office in France. And our new promotion plan. b. first a. finally c. second

To provide clarity on the sequence of your points regarding the focus areas, you seem to be listing parts of a plan or presentation. The best way to organize your thoughts would be as follows:

1. First: Our products in Europe
2. Second: The new office in France
3. Finally: Our new promotion plan

Based on the options you presented (a. finally, b. first, c. second), you should begin with option b: first. After discussing your products in Europe, you would then move on to option c: second, addressing the new office in France. Finally, you would conclude with option a: finally, which is the new promotion plan.

This logical flow allows for a structured presentation, making it easier for your audience to follow along with your key points.