Which Is the Correct Breakdown and Translation of the Term

Which is the correct breakdown and translation of the term expectorant?

A) ex (in) + pec (chest) + ant (agent) = a drug that discourages coughing
B) ex (in) + pec (lung) + ant (agent) = a drug that discourages coughing
C) ex (out) + pec (chest) + ant (agent) = a drug that encourages the expulsion of material from the lungs
D) ex (out) + pec (lung) + ant (agent) = a drug that encourages the expulsion of material from the lungs