Researchers analyzed the medical records of nearly 4,000 Asian and non-Asian cancer patients in Southern California and found that Asians have a much higher survival rate than patients of other races. In general, the 5-year survival rate for Asians has 20%, Latino is 12%, and black and white is 10 %. Some researchers speculate that this may be due to biological differences that make tumors in Asians less invasive. Which of the following does not challenge this view? ['Asians have different dietary habits from other races,.', 'Asians generally attach importance to medical examinations to detect cancer early.', 'In addition to Western medicine, patients with Asian tumors often receive Chinese medicine.', 'Asians have a lower incidence of stomach cancer than other races.']