1. 8055. (1) When performing a ring (coin tap) test on com posite structures, a change in sound may be due to dam age or to transition to a different internal structure. (2) The extent of separation damage in composite struc tures is most accurately measured by a ring (coin tap) test. Regarding the above statements, A. both No. 1 and No. 2 are true. B. only No. 1 is true. C. only No. 2 is true.