Answer: b. Because none of the precautions they took were effective, the pharaohs found a new burial ground in the Valley of the Kings. Explanation: According to the excerpt from "Egyptian Tombs: A Grave Matter,” the cause-effect relationship is illustrated in the fact that pharaohs understood their burial places were in danger of thieves, so they decided protect their tombs and treasures in the Valley of the Kings, whose location was much harder for thieves to break in.
