Which of the following samples contain the smallest number of atoms?

• A.  \[\text{1 g of C}{{\text{O}}_{\text{2}}}\text{ }\left( \text{g} \right)\]  
• B.  \[\text{1 g of }{{\text{C}}_{8}}{{\text{H}}_{18}}\left( 1 \right)\]
• C.  \[\text{1 g of }{{\text{C}}_{2}}{{\text{H}}_{6}}\left( g \right)\]
• D.  \[\text{1 g of LiF}\left( S \right)\]