I am learning about "Business structures and legal protections"

Specially in this class, we are learning business structures and legal protections for businesses.

One of the first decisions when you start a business is to determine the correct legal structure for your company. There are four common types of business entities in the U.S: sole proprietorship, partnership, limited liability and corporation. Each type of structure treats tax, income and liability implications differently for businesses owners and their companies. Meanwhile, legal protections differ from one jurisdiction to another.

Objectives:

• LLC, SCORP etc. for strategic advantage and liability protection
• corporate personhood
• jurisdictional fundamentals

The link is a lawsuit McDonalds filed against Seattle over the minimum wage increase.

https://www.youtube.com/watch?v=uG3t4Y1JHo0

Can you explain the major legal grounds of the opening statement of McDonald's on the sue?

I need to explain the grounds (reasons) and standing (why McDonalds have a right to sue) incorporating understanding of the concept of corporate personhood.