A population of clams have an average width of 1". Slightly wider clams are able to reproduce better so when looking at the next population you notice all the parents have an average width of 2". Comparing the average length of the parents to the average length of the offspring you see there is a slope of 0.81. What is the average body length of the offspring in this population? A. 0.81 B. 1.9 C. 1.81 D. -0.81.