Read this script for a television advertisement. Which sentence would be the MOST effective and appropriate conclusion for this script?

Responses
A Dr. Jones’s Earworm remover has been tested in labs across the country.Dr. Jones’s Earworm remover has been tested in labs across the country.
B. White noise loops are proven to clear the mind and leave you feeling relaxed. White noise loops are proven to clear the mind and leave you feeling relaxed.
C. Other methods might not work, but Dr. Jones’s Earworm Remover comes with a guarantee. Other methods might not work, but Dr. Jones’s Earworm Remover comes with a guarantee.
D. This is just one of five great products that Dr. Jones has successfully marketed in five other countries. This is just one of five great products that Dr. Jones has successfully marketed in five other countries.
E. Satisfied customers agree that Dr. Jones’s Earworm Remover is the most effective way to clear your mind.

E. Satisfied customers agree that Dr. Jones’s Earworm Remover is the most effective way to clear your mind.