Read the passage. a glass harmonica was invented by benjamin franklin and is known as the franklin harmonica. it consists of glass bowls of varying sizes filled with different amounts of water. this instrument was popular in the 1800s. which detail is least relevant to someone researching benjamin franklin’s genius? the instrument was popular in the 1800s. the bowls varied in size and were filled with different amounts of water. the harmonica consisted of glass bowls and water. franklin invented a glass harmonica.

Read this excerpt from i never had it made. "it's all that ought to count," he replied. "but it isn't. maybe one of these days it will be all that counts. that is one of the reasons i've got you here, robinson. if you're a good enough man, we can make this a start in the right direction. but let me tell you, it's going to take an awful lot of courage." he was back to the crossroads question that made me start to get angry minutes earlier. he asked it slowly and with great care. "have you got the guts to play the game no matter what happens? " "i think i can play the game, mr. rickey," i said. the next few minutes were tough. branch rickey had to make absolutely sure that i knew what i would face. beanballs would be thrown at me. i would be called the kind of names which would hurt and infuriate any man. i would be physically attacked. could i take all of this and control my temper, remain steadfastly loyal to our ultimate aim? which is the central idea of this excerpt?