A or C it’s been a while since I seen this question
Old Faithful geyser in Yellowstone
Answer:
new work
Explanation:
all the rest happened in the 1800s and Marco polo was in the 1300s i believe so new work would be the only answer that could fit the time frame
Answer: Method of Agreement
Explanation:
In method of agreement,
there's comparison between two or more effects/events in different circumstances to know what they have in common. With this, the researcher would be able to eliminate all variables that are not needed for occurrence of the phenomenon.