Please Use the Following Information to Answer the Questions Below

Please use the following information to answer the questions below.
A scientist hypothesizes that biological magnification of heavy metals in fragment-dwelling,insect-eating birds should be greater in forest fragments with relatively more edge habitat.This is because edge-dwelling bird species may forage for insects in areas contaminated by heavy metals outside of the forest.Forest fragments with more interior habitat would not have as much biological magnification because insect-eating interior bird species would have less exposure to insects that contain heavy metals.
-To test this hypothesis,the scientist conducts an experiment.Which of the following designs would be most informative?

A) Locate a single forest fragment with equal amounts of edge and interior habitat,then sample the blood of insect-eating birds at regular distances across the widest point of the fragment.
B) Locate several forest fragments of similar sizes but different shapes,then sample the blood of insect-eating birds at regular distances along a 100-m path in each fragment.
C) Locate several forest fragments of different sizes but similar shapes,then sample the blood of insect-eating birds at regular distances along a path across the widest point of each fragment.
D) Locate several forest fragments of similar sizes and shapes,then sample the blood of insect-eating birds at regular distances along a 100-m path in each fragment.