Following Is a List of the Performance of the Different

Multiple Choice

Following is a list of the performance of the different genotypes at the S locus in two environments for three populations of lizards.The first number is their running speed (in m/s) , and the second is their relative strength. In which population(s) is there evidence for a trade-off between running speed and relative strength?

A) Only population 1
B) Only population 2
C) Only population 3
D) Both populations 1 and 2
E) None of the populations