You're running an email campaign. The last email you sent had a click-through rate of 2.7%, while your campaign's average CTR is 3.1%. Is your last email's CTR high-performing or low-performing? A. low-performing because it's less than average CTR B. high-performing because it's relatively close to the campaign's average CTR C. low-performing because any CTR under 5% is underperforming D. needs further context, especially of the industry specific benchmarkWhich of the following is NOT a benefit of A/B testing? A. reducing risk B. improving open and click-through rates C. building community D. identifying best practices