|Question 24Verbal

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While researching a topic, a student has taken the following notes:

• A supercontinent is a single landmass made up of most or all of Earth's continents.
• Over time, continents merge together to form supercontinents, which then break apart.
• This process is believed to take hundreds of millions of years and is known as the supercontinent cycle.
• Ur was a supercontinent that formed about 3.1 billion years ago.
• Euramerica was a supercontinent that formed about 300 million years ago.
The student wants to emphasize a difference between the two supercontinents. Which choice most effectively uses relevant information from the notes to accomplish this goal?
Euramerica formed about 300 million years ago, but Ur formed much earlier-about 3.1 billion years ago.
A
Forming and breaking apart over hundreds of millions of years, supercontinents are made up of most or all of Earth's continents.
B
Ur and Euramerica were both supercontinents, single landmasses made up of most or all of Earth's continents.
C
Ur formed about 3.1 billion years ago but eventually broke apart.
D