Consider this passage: alice sent that memo to bill. he got it; charlie said he handed the memo to bill. bill says he didn't know about the rule change. that's a lie, since doreen said she witnessed bill reading something right after charlie left his office; the rule change was announced in that memo. furthermore, alice announced the change in policy over the public address system while bill was in his cubicle and awake, for once. alice couldn't have done any more to make him aware. what is the conclusion of the argument in this passage? select one: a. bill is lying about not knowing about the rule change. b. alice sent the memo to bill. c. bill sleeps in his cubicle a lot. d. alice did her best to tell bill of the rule change.