What is the mass of one molecule of oxygen?

• A. \[5.31\times {{10}^{-23}}g\]      
• B.        \[5.33\times {{10}^{23}}g\]
• C. \[5.25\times {{10}^{23}}g\]     
• D.        \[5.02\times {{10}^{-23}}g\]