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

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

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

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

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