What is the missing term in the following product? \[(2{{a}^{3}}-3)\,(5{{a}^{3}}-2)=10{{a}^{6}}+\_\_\_\_\_\_\_\_\_+6\]

• A.  \[16{{a}^{3}}\]      
• B. \[-16{{a}^{3}}\]
• C.  \[19{{a}^{3}}\]      
• D. \[-19{{a}^{3}}\]