A nurse is providing teaching about self-administration of insulin to the parent of a school-age child who has a new diagnosis of diabetes mellitus. Which of the following statements by the parent indicates a need for further teaching?

"The insulin can be injected anywhere there is adipose tissue."

"The insulin should be injected at a 90-degree angle."

"I will be sure my child aspirates before injecting the insulin."

"I will be sure my child rotates sites after 5 injections in one area."