In $2018,$ Starbucks announced to great fanfare that it will eliminate straws from all its stores within two years in an effort to reduce plastic ending up in landfills. To accomplish this goal, it will replace straws with a "sippy lid" on all its beverages. See the tweet below as an example of its advertising of this initiative. In response to this news, Starbucks was listed as "the most environmentally friendly coffee chain" by U$.$S$.$ News and World Report in $2019,$ and the price of its stock increased $10\%$ that year. However, scientists later found that its new "sippy lids" used more plastic than the old lid and straw combination combined. This is an example of Starbucks engaging in: $1.$A consumer boycott

$2.$ A private stewardship regime

$3.$ Greenwashing

$4.$A corporate code of conduct