Refer to the following iron-carbon phase diagram to answer the question. The three important composition points on the eutectoid horizontal (723C) are 0.02 wt% C, 0.8 wt% C and 6.67 wt% C. 1500- 1000- Temperature (C) A 500- B C D 1 E 2 3 4 Composition (wt% C) Also refer to the following optical micrographs. 15 6 6.67 2 Consider the microstructure labeled 1. Which one of these situations is most likely to produce this type of microstructure? 1 1 1 Consider the microstructure labeled 1. Which one of these situations is most likely to type of microstructure? OA 0.8 wt% C steel alloy cooled slowly from 1000C to 500C. OA 0.2 wt% C steel alloy cooled slowly from 850C to room temperature. OA 1.0 wt% C steel alloy cooled slowly from 700C to 150C. O A 0.01 wt% C steel alloy cooled slowly from 1000C to 20C. No new data to save. Last checked at 10:18pm