A deployment engineer must ensure that Webex Calling traffic receives priority treatment across the enterprise WAN. Which QoS approach is recommended?

Refer to the exhibit. An engineer is developing a web chat workflow for the marketing department.
After the standard Live Chat workflow template is deployed, chats are failing. The chat widget on the website is visible. When a new chat is started, the message "Sorry, unable to process your request right now. Please try again later" is received. The engineer debugs the workflow and receives the response in the exhibit from the resolve node. Which action resolves the issue?

Which API scope is required for a REST PUT request to /organization/{orgid}/v2/contact-service- queue/{id}?

Which authentication and authorization specification is required for using Webex Contact Center APIs?

A company wants to integrate its on-premises contact center with Webex Contact Center while minimizing PSTN costs. The engineer must ensure that agents can make and receive calls through the existing SIP trunk infrastructure. Which deployment option best meets this requirement?