The tutu, a popular ornamental plant, does not reproduce naturally, and is only bred and sold by specialized horticultural companies. Unfortunately, healthful is easily devastated by a contagious fungal rot. The government ministry plans to reassure worried gardeners by requiring all tutu plants to retested for fungal rot before being sold. However, infected plants less than 30 weeks old have generally not built up enough fungal rot in their systems to be detected reliably. And many tutu plants are sold before they are 24 weeks old.
Which of the following, if performed byte government ministry, could logically be expected to overcome the problem with their plan to test for the fungal rot?