Instructions: Choose the causal method best represented in the given passage. Lucas, Nina, and Boe are part of a weight-control study. Nina and Boe exercise daily. Neither Nina nor Boe are overweight. Lucas, Nina, and Boe all eat relatively healthy. However, Lucas does not exercise on a regular basis and he has been known to pack on a few pounds. Clearly, regular exercise keeps a body within a healthy weight range. This is an example of __________ The Method of Agreement The Method of Difference Joint Method of Agreement and Difference The Method of Residues The Method of Concomitant Variation