C, make sure you see a doctor whenever a joint or ligament hurts even if you think it’s not a big deal you would want to get it taken care of now before it gets worse :)
The range of a set of data is the difference between the highest and lowest values in the set.
And to find the range, first order the data from least to greatest. Then subtract the smallest value from the largest value in the set.
The answer is: c because the rate that these consumers convert the chemical energy to their food into their own biomass