When using multiple Access Token Managers, the Send Audience option ensures that tokens are scoped properly and validated against the intended resource/application.

Exact Extract:

''Enable Send Audience in the token provider configuration to support environments with multiple Access Token Managers and enforce correct audience restrictions.''

Option A (Subject Attribute Name) is unrelated --- it maps user identity but not token manager selection.

Option B (Send Audience) is correct --- required when multiple ATMs are in use.

Option C (Use Token Introspection Endpoint) is optional and depends on deployment, not mandatory for multiple ATMs.

Option D (Client Secret) is part of OAuth client credentials, not specific to multiple ATMs.