20. which of the following is a complex sentence? a. as jake was reading the email from june yet again, the flight attendant coughed gently to get his attention. b. i would like to visit the kinshasa, but i understand the city is unsafe for foreigners. c. check out the editorial page in today's paper and you'll notice the piece by george will. d. i simply cannot make heads or tails of rap lyrics, but i suppose i'm just too old to understand them.