Question

the theory of global warming states that the average temperature of the earth has been increasing over time. this theory will be most strongly affected by scientific studies that

• allow the measurement of the earths temperatures at the poles
• reveal how the earths temperature has fluctuated in the past
• reveal how the earths temperature varies from location to location
• allow the measurement of the earths temperature with greater precision.

Explanation:

To assess the theory that Earth's average temperature is increasing over time, knowing its past temperature fluctuations is crucial. Past data can provide context to determine if current increases are part of a natural cycle or a new trend due to human - induced factors. Measuring at poles only gives regional data, temperature variation by location doesn't directly address the time - based increase, and greater precision in current measurements without historical context is less impactful.

Answer:

B. reveal how the earth's temperature has fluctuated in the past