A study involving 1200 bird species was conducted by researchers from the University of Bath in the UK. Which of the following sentence is the correct result of the study?

• A. Birds with larger brains are more likely to survive harsh climatic conditions
• B. Birds with smaller brains are more likely to survive harsh climatic conditions
• C. Birds with a bigger body are more likely to survive harsh climatic conditions
• D. Birds with a smaller body are more likely to survive harsh climatic conditions