C. data analysis.
I just took a test with this exact question and c was the correct answer
D. similar species in different areas with unique traits
The substance is DNA and it would be found in the nucleus.
Explanation:
Lactic acid is a common topic among athletes and sports enthusiasts, especially in regards to performance and recovery. Research about lactic acid in recent years explains the effects of lactate on performance, but these effects are different from what was previously believed.
In the past, people have blamed lactic acid for muscle soreness and performance fatigue. However, newer evidence finds that lactic acid actually provides another fuel source for working muscles and may even improve performance.