Which choice most logically completes the text? | Verbal SAT Question

Evan MacLean and colleagues evaluated behavioral and genetic data from over 14,000 dogs, representing more than 100 breeds, and found that genetic variations track to differing extents with behavioral variations between the breeds. This was the case for the behavioral categories of dog rivalry and energy but was especially pronounced for chasing, which can be seen when a dog pursues small animals like birds or squirrels. In another study, researchers found that the bulldog and the Yorkshire terrier breeds exhibit very different levels of chasing. When considered in light of the study by MacLean and colleagues, this finding suggests that __________

Which choice most logically completes the text?

there may be a greater tendency toward chasing in bulldogs and Yorkshire terriers than in some other dog breeds.

individual bulldogs may display higher levels of chasing than individual Yorkshire terriers do.

bulldogs and Yorkshire terriers are more likely to share genes associated with chasing than to share genes associated with dog rivalry or energy.

there may be a substantial dissimilarity between bulldogs and Yorkshire terriers in the genes associated with chasing.