\({\left( {\frac{{81}}{{16}}} \right)^{\frac{{ - 3}}{4}}}\; \times \;\left[ {{{\left( {\frac{{25}}{9}} \right)}^{\frac{{ - 3}}{2}}} \div {{\left( {\frac{5}{2}} \right)}^{ - 3}}} \right]\) can be simplified to:

• A. 1/2
• B. 1
• C. 1/4
• D. 4