Options are:
I. animals;
II. coastlines;
III. waves;
IV. rays or beams;
V. submarines;
VI. water;
VII. tsunamis;
VIII. patch reefs;
Given those answer options, answer the question: Fact 1: Sonar is used to find the location of an object. Fact 2: Submarines use sonar to find objects under the water, including other submarines. Given the two facts above, what can sonar be used to find?
A:
V.