Wheat interplanted in a corn field may have wheat yellow leaf disease, which is caused by insufficient light. Once the light is sufficient, such as reducing the number of corn plants, or after the corn is harvested, the symptoms will soon disappear and will not It affects yield. Wheat rust is caused by Puccinia striiformis. If the disease is not properly dealt with at the beginning of the disease, the wheat plant will die quickly. Because the early symptoms of wheat rust and wheat yellow leaf disease are difficult to distinguish, Interplanting wheat in cornfields must pay great attention to the regular screening and prevention of wheat rust. Which of the following is most likely assumed by the above argument? ['Wheat yellow leaf disease does not induce wheat rust.', 'Puccinia variabilis will not lose its invasiveness to wheat due to sufficient light.', 'Wheat rust will not reduce wheat yield if it is timely and properly treated.', 'Scientists have never found medicines that can effectively curb wheat rust.']