What is meant by the invisibility of one's own culture

Read the excerpt from it's our world, too! : young people who are making a difference. the author’s purpose in this excerpt is to

Which of the following events of the story actual occurs first in the sequence of events

Consider the title and souce of the following articles. which one is most likely to exhibit a bias? (a) how to roast beef," by the food editor of a magazine (b) americans experiencing greater fatigue than previous generations, " by a harvard researcher (c) "americans' worsening eyesight not related to computer screen usage," by the public relations director of a major computer manufacturer (d) "sharing the burden: a history of cooperation," by a college professor