Answer:
(1)Option d. Bede took the utmost pains to assure himself of their authenticity. He is careful to acquire, if possible, first-hand evidence; where this cannot be obtained, he scrupulously mentions the lack of it. He admits only the testimony of (2) option B. witnesses of high character and generally quotes them by name.
The excerpt from "A Commentary on the Venerable Bede" is completed by these two words. Something authentic is defined as not false or imitation, but real and actual. A witness or witnesses is something or someone that serves as evidence of proof.