Which question is unstructured?

Multiple Choice

$$What scent would you prefer in a floor cleaner?$$

$$How satisfied were you with your last shampoo purchase: very unsatisfied, unsatisfied, neutral, satisfied, or very satisfied?$$

$$Were you happy with the quality of the shampoo you purchased $($Yes$/$No$)?$

$$On a scale from $1$ to $5($with $1$ being very unimportant and $5$ being very important$),$ how important is fragrance when choosing a shampoo?$$

$$How many brands of shampoo have you purchased in the past year: $0,1,2,3,4,5,$ or more than $5?$