Question

Read the passage carefully and answer the following question.
Geologists have been investigating a potential cycle in geological events for a long time. Back in the 1920s and 30s, scientists of the era had suggested that the geological record had a 30-million-year cycle, while in the 1980s and 90s researchers used the best-dated geological events at the time to give them a range of the length between 'pulses' of 26.2 to 30.6 million years. Now, everything seems to be in order – 27.5 million years is right about where we'd expect. A study late last year suggested that this 27.5-million-year mark is when mass extinctions happen, too.
Which of the following statements can be BEST concluded from the passage?

• A. Geological disasters happen sporadically
• B. Not all species go extinct once every 27.5 million years
• C. Mass extinctions and “geological pulse” are correlated
• D. “Pulse” between geological events is constant
• E. All species go extinct once every 27.5 million years

Answer 1

Answer: (C)

Mass extinctions and “geological pulse” are correlated

Answer 2

The correct answer is option (C):Mass extinctions and “geological pulse” are correlated