1. 8244. (1) In nondestructive testing, a discontinuity may be defined as an interruption in the normal physical structure or configuration of a part. (2) A discontinuity may or may not affect the usefulness of a part. Regarding the above statements, A. only No. 1 is true B. only No. 2 is true. C. both No. 1 and No. 2 are true.