Devon is having a conversation with carol. as devon speaks to carol, she crosses her arms and looks perturbed. devon notices that carol looks unhappy and begins to talk about something else. when devon changes topics, carol wonders why the conversation shifted and looks confused. from what is described here, what best characterizes the interaction?
(a) devon is the sender encoding messages to carol. carol is the receiver that then decodes the message.
(b) neither devon nor carol is a sender or receiver because they are oblivious to each other's messages.
(c) devon and carol occupy different environments, therefore they communicate in a linear fashion
(d) devon and carol are the senders and receivers simultaneously. this is apparent because carol's facial expressions sent message to devon while he spoke

economic

american political culture includes a plenty of focus views and preferences. not all westerns experience the same opinions, of course, but the large preponderance promises to these general ideas, including equality, justice, freedom, individualism, integrity, and difference.

the united states is a democratic republic. residents elect representatives to governmental, nation, and local administration; those deputies create the regulations that command u.s. community. although emptiness in u.s. law needs it, in usage, the administrative system is ruled by executive factions.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."