Which of the Following Illustrates the Conversion of a Volume

Which of the following illustrates the conversion of a volume of ammonia gas at STP to molecules of NH₃?

A) mol NH₃ → molecules NH₃ → L NH₃
B) mol NH₃ → L NH₃ → molecules NH₃
C) molecules NH₃ → mol NH₃ → L NH₃
D) L NH₃ → mol NH₃ → molecules NH₃
E) L NH₃ → molecules NH₃ → mol NH₃