If a flow variable ϕ can be resolved by spatial LES filtering as Φ and Φ’. Expand the term \(\rho\overline{u_iu_j}\).

• A. \(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}\)
• B. \(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{u_i^{‘}u_j^{‘}}\)
• C. \(\rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}\)
• D. \(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}+\rho\overline{u_i^{‘}u_j^{‘}} \)