Enterprise architecture can increase the ability of enterprises to assess and manage risks. Which of the following are true regarding EA and risks? (Check all that are true.) a. The incremental improvement in IT responsiveness is greatest as organizations move from stage 2 (Standardized Technology) to stage 3 (Optimized Core). b. When EA standardizes technology it reduces risk, because the IT team is familiar with the standard technology, so systems can be developed more quickly and more predictably. c. The risk of developing a new EA in a "greenfield" environment is equivalent to keeping a "brownfield" legacy EA running. d. In a standardized environment, business and technology leaders have fewer technology choices, and so spend less time on technology decisions or technology risk management because the risks are understood