If \({\rm{a\;}} + {\rm{\;}}\frac{1}{{\rm{a}}}{\rm{\;}} = {\rm{\;}}3,\) then \(\left( {{{\rm{a}}^4}{\rm{\;}} + {\rm{\;}}\frac{1}{{{{\rm{a}}^4}}}} \right)\) is equal to:

• A. 77
• B. 81
• C. 47
• D. 27