Global dietary patterns are increasingly dominated by relatively cheap, highly palatable, and ready-to-eat ultra-processed foods (UPF). A recent study at the UK Biobank examined the association between UPF consumption and the risk of cancer among 150 British adults (aged 40-69 years) who kept 24-hour dietary logs between 2009 and 2012 and were followed up with until Jan 31, 2021. Food items consumed were categorized according to their level of food processing using the NOVA food classification system. Individuals' UPF consumption was expressed as a percentage of total food intake (g/day). Assuming the UPF consumption in the study sample is normally distributed with a mean of 22.9 and a standard deviation of 13.3, what would be the 95% confidence interval around this estimate of the mean? a. There is a 95% chance that the true mean percentage of total food intake will fall within the interval (19.07, 23.33). b. We are 95% confident that the true mean percentage of total food intake will fall within the interval (20.75, 25.05). c. We are 95% confident that the interval (21.03, 21.37) actually does contain the true value of the mean percentage of total food intake. d. We are 95% confident that the interval