I want to know the answer to the following question:
What type of private  individual had several generals and politicians used to validate their actions?
All the background I'm provided with is that "During the mid-to-late Republic, the reformist Gaius Gracchus, the populist politician-general Gaius Marius and his antagonist Sulla, and the "notorious Verres" justified their very different policies by the divinely inspired utterances of private diviners.". Is that enough to answer the question?
Answer: yes