The correct answer is B. Both were examples of Arab-Israeli conflicts in the twentieth century.
Step-by-step explanation:
Both the Six-day war and the Yom Kippur war were conflicts in which Israel and other Arab countries fought against each other. In the case of the Yom Kippur War, this occurred in 1973 for two weeks and five days; also, this involved Egypt and Siria fighting against Israel. On the other hand, the Six-day war occurred in 1967 for five days; also, this involved Egypt, Jordan, and Syria against Israel. According to this, the two wars occurred during the 20th century and both are part of Arab-Israeli conflicts in which Israel fought against Arab states or countries (Option B).