A nurse is reinforcing education to the parent of a 5-year-old client who has manifestations consistent with autism spectrum disorder (ASD). Which of the following statements should the nurse reinforce about the screening process for ASD?

"Screening involves a combination of parent interviews, observations, and standardized developmental screening tools."

"ASD can be definitively diagnosed with a simple blood test, so we will schedule one for your child."

"The screening process for ASLs usually completed in one visit to the healthcare provider."

"If your child makes eye contact with you we can rule out autism spectrum disorder."