Antronomers Investigated the Arrable 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 Arable 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? A. the current makeup of the Arabla Terra region might not accurately reflect the volcanic activity of Mars's past. B. eruptions from Mars's volcanoes were likely not as massive as astronomers previously believed. C. ash was most likely expelled from multiple different volcanoes on Mars's surface. D. the craters found in the Arabia Terra region were necessarily created by events other than volcanic eruptions.

## Step 1<br />The problem presents a scenario where astronomers are investigating the Arrable Terra region of Mars. They have found remnants of ash deposits that suggest a massive volcanic eruption. However, they also acknowledge that erosion and past resurfacing events could have modified the surface of the planet.<br /><br />## Step 2<br />The question asks us to logically complete the text based on the information provided. The text suggests that the current state of the Arrable Terra region may not accurately reflect the volcanic activity of Mars's past due to the potential for surface modification.<br /><br />## Step 3<br />Looking at the options, option A states that the current makeup of the Arrable Terra region might not accurately reflect the volcanic activity of Mars's past. This statement aligns with the information provided in the text, as it acknowledges the potential for surface modification and the uncertainty of the current state of the region.