Respuesta :
The least relevant detail for someone researching Franklin's genius would be: The instrument was popular in the 1800s.
The other answer options each contain technical information that demonstrate the uniqueness and workings of his harmonica idea and design. However, whether or not the harmonica was popular at the time has no bearing on how clever or innovative Franklin was. Therefore, the second option is the correct answer.
The other answer options each contain technical information that demonstrate the uniqueness and workings of his harmonica idea and design. However, whether or not the harmonica was popular at the time has no bearing on how clever or innovative Franklin was. Therefore, the second option is the correct answer.
Answer:
it would be B. The instrument was popular in the 1800s.
Explanation: