Which of the following is an example of a positive externality? a) Sam dug a pond so he could go fishing, but the pond has contributed to an explosion of mosquitoes in your neighborhood. b) Sam has dozens of cats, and they come into your yard to hunt the birds that come to your bird bath. c) Sam buys a dilapidated house because of low price. He renovates it. By doing so it also increases the property values of all houses in the neighborhood. d) Liquid waste from Sam's chicken farm flows into a neighbor's well water.

Northern lights electronics just completed plans to distribute its new tablet. the product has several unique features that differentiate it from competitor products. the marketing team plans to begin a roll-out with to only one traditional retailer for the first two months. this strategy will give consumers the perception of the product’s stand-out personality and increase demand. marketing will proceed with for the next four months, where it plans to distribute to three other retailers, as well. for the last six months of the year, it will initiate distribution agreements with discount retailers and online retailers, and any other electronics store that wants to carry it. the marketing team is confident that the tablet will cycle through the first three stages of its product life cycle quickly. as the tablet reaches maturity during the second half of its first year in the market, it is good strategy to proceed with as described above. intensive distribution; selective distribution; exclusive distribution exclusive distribution; selective distribution; intensive distribution tertiary level distribution; secondary level distribution; mono-level distribution mono-level distribution; secondary level distribution; tertiary level distribution