GRE Text Completion: ETS Official Practice 150-GRE OP150:填空 - E00M12UTMQANG5YCO

Even as the economy struggled, the secretary stood by his ____________ long-term outlook, saying that technology was allowing businesses to make deep-rooted improvements in their productivity, the best indicator of an economy's ability to grow. A. arcane B. sanguine C. equivocal D. ambivalent E. irresolute