If the prefix ir- means "not" and re- means "back," what is the exact meaning of the word irreversible in the following sentence? once the space shuttle launched into orbit, its course was irreversible. a. not able to turn back b. not able to continue on c. not able to move sideways d. not able to chart its path

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