Which phrase indicates the authority and status of Nadine Northbuster in her testimonial about Rand's beauty treatment?

The phrase that indicates the authority and status of Nadine Northbuster in her testimonial is "American wife of the great-great-grandson of Queen Victoria." This phrase carries significant weight due to several factors. Firstly, the mention of her being an "American wife" connects her to both American and British heritage, implying a blend of cultural sophistication and a notable family lineage.

Additionally, being associated with the great-great-grandson of Queen Victoria, who was a well-known historical figure and monarch, suggests that she has a connection to royalty and establishes her credibility and prestige. This link to such a prominent lineage enhances her status, making her testimonial more influential and persuasive to the audience regarding Rand's beauty treatment. The other options, while they may pertain to her identity or achievements, do not convey the same level of implied authority or connection to a widely recognized legacy.