Astronomers investigated the Arabia Terra region of Mars because it appears to contain irregularly shaped craters that may have been caused by massive volcanic explosions. In their investigations of Arabia Terra, the researchers found remnants of ash deposits in an amount and thickness that would result from a massive volcanic eruption. However, erosion and past resurfacing events could have modified the surface of the planet. Therefore, ________

Which choice most logically completes the text?

Question

Accepted Answer

the current makeup of the Arabia Terra region might not accurately reflect the volcanic activity of Mars's past.

Answer

eruptions from Mars's volcanoes were likely not as massive as astronomers previously believed.

Answer

ash was most likely expelled from multiple different volcanoes on Mars's surface.

Answer

the craters found in the Arabia Terra region were necessarily created by events other than volcanic eruptions.