What other change could double the fundamental frequency? (Changing length in this case refers to moving the fixed point to a different position of the string, perhaps by putting down a finger on the guitar string). Select the correct answer Increase the string length by a factor of 2 Increase the string length by a factor of 4. None of these options would double the fundamental frequency? Decrease the string length by a factor of 2 Decrease the string length by a factor of 4