What Is an Example of an Unstructured Question

What is an example of an unstructured question?

A) "What are the most important characteristics for choosing a brand of shampoo?"
B) "How satisfied were you with your last shampoo purchase: very unsatisfied, unsatisfied, neutral, satisfied, or very satisfied?"
C) "Were you happy with the quality of the shampoo you purchased (Yes\No) ?"
D) "On a scale from 1 to 5 (with 1 being very unimportant and 5 being very important) , how important is fragrance when choosing a shampoo?"
E) "How many brands of shampoo have you purchased in the past year: 0, 1, 2, 3, 4, 5, or more than 5?"