TASK DEFINITION: Read the passage and find if the passage agrees, disagrees, or has a neutral stance on whether Global warming is caused by human activities. Answer only with keyword (a) agrees - if passage agrees with the target (b) disagrees - if passage disagrees with the target (c) neutral - if the given passage neither agrees nor disagrees with the target. You don't need to use external knowledge in this task, and you have to answer based on the given passage.
PROBLEM: There is some change in how carbon is divided between the atmosphere and the ocean.

SOLUTION: neutral

PROBLEM: Temperature readings from the Arctic and Antarctic used to estimate the effects of global warming are nothing more than guesswork.

SOLUTION: disagrees

PROBLEM: Through the 1980s, Exxon researched the emerging science of man-made climate change by, among other things, modeling increases in global temperatures due to carbon dioxide emissions.

SOLUTION:
neutral