The new heart scans offer patients significant benefits. They can be completed in a fraction of the time required for an angiogram, with no recovery time necessary. Furthermore, the scans are more sensitive and can identify problem areas that an angiogram might not perceive. However, heart scans use more radiation than most diagnostic procedures, and can cause undue concern over and treatment for the harmless abnormalities often picked up by such sensitive technology. Which of the following conclusions is best supported by the statements above? ['Angiograms are more widely used than heart scans.', 'Patients should not be concerned about heart abnormalities that appear in a heart scan.', 'A heart scan could result in indirect harm by causing a patient to undergo unnecessary procedures.', 'A heart scan is the more appropriate of the two procedures for most patients.']