Which statement about DML and loops is true?

The correct statement emphasizes the best practice of performing DML operations outside of loops to optimize performance and avoid hitting governor limits in Salesforce. When DML operations, such as Create, Update, Get, or Delete, are executed within a loop, they can lead to excessive resource consumption. This is because Salesforce imposes limits on the number of DML statements that can be executed in a single transaction. By placing DML operations outside of loops, you can handle all records in bulk, which is more efficient and reduces the risk of exceeding these governor limits.

This approach aligns with Salesforce's best practices for bulk processing, where you collect the records that need to be manipulated in the loop, store them in a collection, and then perform the DML operation as a batch after the loop has completed. This not only enhances performance but also ensures that your operations are scalable and maintainable.

Considering the other options, they either suggest practices that could lead to inefficient handling of DML operations or incorrectly state that DML should take place within loops. Not adhering to best practices can result in failure to process records efficiently or hitting limit errors in Salesforce, which can disrupt business processes.