Comprehensive and Detailed in Depth Explanation:

Token renewal extends a token’s TTL. Let’s evaluate:

A: TTL- Defines expiration time, not used for renewal. Incorrect.

B: Token ID- The token’s unique identifier; can be specified to renew it (e.g., vault token renew ). Correct.

C: Identity policy- Relates to access control, not renewal. Incorrect.

D: Token accessor- A unique identifier for operations like renewal without exposing the token (e.g., vault token renew -accessor <accessor>). Correct.

Overall Explanation from Vault Docs:

“Tokens can be renewed with vault token renew using either the token ID or accessor… TTL is not an attribute for renewal.”