According to medical records, the incidence of global cancer has increased by nearly 10 times in the second half of the 20th century compared to the first half, making it the first killer to threaten human life. This shows that the global ecological imbalance caused by the rapid economic development marked by high technology in the second half of the 20th century is an important cause of cancer. The following items, if true, can weaken the above argument, except. ['The average life span of human beings is about 30 years old in the early 20th century, about 40 years old in the middle of the 20th century, and currently about 65 years old. The average life expectancy in developed countries with high cancer incidence is generally over 70 years old.', 'In the first half of the 20th century, humans experienced two world wars, and a large number of young and middle-aged people died in the war; in the second half of the 20th century, the world was basically in a period of peaceful development.', 'High technology has greatly improved the accuracy of medical diagnosis and the coverage of this accurate medical diagnosis worldwide.', 'High technology has greatly improved the ability of humans to prevent, detect and diagnose cancer early, and effectively prolong the life of cancer patients.']