A developer needs to use the 'contacts/ route of the REST API to update records...

[References:, Salesforce Marketing Cloud REST API, Contact Builder and Attribute Groups, =========================, Questions no: 153Verified Answer: DComprehensive Detailed Step by Step Explanation with References:To ensure a blank email will not be sent when creating a complex dynamic email with multiple sections and content blocks, the developer should confirm every version has default content (D). This practice ensures that if any dynamic content fails to load or meet the conditions, the default content will be displayed, preventing a blank email from being sent., References:, Salesforce Marketing Cloud AMPscript Guide, Salesforce Marketing Cloud Dynamic Content Best Practices, =========================, Questions no: 154Verified Answer: DComprehensive Detailed Step by Step Explanation with References:When using the REST API to send emails to customers after a purchase, the developer should make a token API call and re-use the token until the token expires (D). This approach optimizes API usage by reducing the number of token requests, ensuring that the token is reused until it naturally expires, after which a new token can be requested., References:, Salesforce Marketing Cloud API Authentication, Token Management Best Practices, Top of Form, , ]