The following sentence is in the passive voice. what are the subject and the verb of this sentence?

before the passengers boarded a plane that day, they were extensively-some would say carefully; others, intrusively-screened by security officials.
select one:
a. passengers; board
b. they; were screened
c. officials; screened

While doing your research, all of the following would be good secondary sources to use to develop a general overview about the vietnam war, except: a. the encyclopedia britannica b. an interview with a veteran of the war c. a textbook on the history of the 20th century d. an online resource such as ‘wikipedia.org’ or ‘’

How did rick respond to this conflict

Read these lines from stanza 5 of the poem, “they shot wook kim” and answe the question. hung in the air/over that petroleum morgue that night. what does the use of the phrase “petroleum morgue” best suggest? an atmosphere of chemical detachment an unsettling place of ultimate rest a dark street containing a lifeless body an area containing putrid substances and smells