To pair with another device such as a speaker you would use the Bluetooth feature to link the two devices together, also known as pairing.
The whole idea of lower and upper bounds in Integration is that the lower bound represents the smallest value from which we start summing areas(smallest value of the interval) and upper bound is the value to which we sum to(maximum value of the interval).
(Just gave you an answer describing what it was because you didn’t implant a question so I gave you a definition)
I believe the answer is B. Optimization because it means to make work more efficient but I might be wrong. Checking definitions, this one seems more logical.
