The trustworthiness of a speaker adds to the speaker's a. emotional appeal. b. ethical appeal. c. verbal appeal. d. appeal to reasoning.

The correct answer is; B. ethical appeal

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.