Which sentence does not contain any errors in period usage?
a. have you read the hobbit by j. r. r. tolkien?
b. my brother's platoon leader is lt brian lee.
c. rev jesse l. jackson has run for public office.
d. sgt eva miller will be able to answer your question.

The sentence does not contain any errors in period usage is letter (A) Have you read The Hobbit by J. R. R. Tolkien? Letter B is lacking a period after 'Lt'. Letter C lacks period after 'Rev' and letter D lacks a period right after the word 'Sgt.' As much as possible, contracted titles should have periods right after it.

The first-edition tales influenced folklorists to trust one another to gather authentic tales of living conditions.

Explanation:

The Grimm brothers acquired their stories from taught individuals they came to know great. These associates, then again, first assembled the tales from individuals who needed training. So despite the fact that the Grimms did not know every one of the sources  of their accumulation of stories, regardless they utilized the educated individuals they believed in.