Final answer:
C.Theranos, claimed to revolutionize blood testing by using a minimal amount of blood for quick and comprehensive analysis, though later investigations brought the technology's effectiveness and validity into question.
Step-by-step explanation:
The innovation introduced by Elizabeth Holmes with Theranos is best described as C) Theranos revolutionized blood testing by using a minimal amount of blood for quick and comprehensive analysis. This approach represented a significant shift from traditional blood-testing methods, which required larger volumes of blood and longer analysis times.
The vision of Theranos was to streamline and simplify the diagnostic process, though it is important to note that later developments revealed various problems with the company's technology and business practices.