74. The method used by Wadati to determine the depths of earthquakes is most like whichof the following?
(A) Determining the depth of a well by dropping stones into the well and timing howlong they take to reach the bottom
(B) Determining the height of a mountain by measuring the shadow it casts at differenttimes of the day
(C) Determining the distance from a thunderstorm by timing the interval between theflash of a lightning bolt and the thunder it produces
(D) Determining the distance between two points by counting the number of paces ittakes to cover the distance and measuring a single pace