Question
Like Earth, Mars contains plenty of volcanoes, and also like Earth, most volcanoes on the Red Planet spew lava. However, many space scientists' believe that Mars may also have another type of volcano: one that gushes mud from its opening.
Mud volcanoes are not a new phenomenon, and they exist in various places on our planet, including the ocean's floors. What makes Mars' mud volcanoes so interesting is that they are a strong signal for the presence of water.
The possibility of water deposits on Mars has intrigued scientists for some time because a water source would be required prior to any permanent human habitation. Today's astronauts bring water with them for missions, but this would prove challenging on a lengthy mission to Mars.
With future research into other water sources, such as a potential underground lake, scientists are hopeful that a mission to Mars may soon be possible—perhaps only some ten years' away. Explorers on these missions are very likely to seek out and confirm the existence of mud volcanoes and the lake, which is believed to be some twelve miles across.
Which choice makes the sentence most grammatically acceptable?
Elimination Tool
Select one answer
A
No Change
B
mile's
C
miles'
D
miles's
Mud volcanoes are not a new phenomenon, and they exist in various places on our planet, including the ocean's floors. What makes Mars' mud volcanoes so interesting is that they are a strong signal for the presence of water.
The possibility of water deposits on Mars has intrigued scientists for some time because a water source would be required prior to any permanent human habitation. Today's astronauts bring water with them for missions, but this would prove challenging on a lengthy mission to Mars.
With future research into other water sources, such as a potential underground lake, scientists are hopeful that a mission to Mars may soon be possible—perhaps only some ten years' away. Explorers on these missions are very likely to seek out and confirm the existence of mud volcanoes and the lake, which is believed to be some twelve miles across.
Which choice makes the sentence most grammatically acceptable?
Elimination Tool
Select one answer
A
No Change
B
mile's
C
miles'
D
miles's
Answers
GPT-4o mini
The correct choice is:
A
No Change
The phrase "twelve miles across" is grammatically correct, as "miles" is functioning as a plural noun to describe the distance. Therefore, no change is needed.
A
No Change
The phrase "twelve miles across" is grammatically correct, as "miles" is functioning as a plural noun to describe the distance. Therefore, no change is needed.