Now, let's imagine that when you went back to sample House Sparrows, despite your hard work , you fail to recapture an individual. What would be a reasonable conclusion of your study, regarding your estimate of population density of House Sparrows at UMass Boston? a . That the House Sparrow population is so small that cannot be effectively differentiated from infinite b . That the bird population density is so large that cannot be effectively differentiated from infinite . That more sampling effort is needed to improve precision in our population density estimate d . That House Sparrow are becoming more "shy", and thus are avoiding recapture