A. NVF and TVD
B. NWF and DWF
C. NVF and DWF
D. TVD and NWF
I have been asked this question in homework.
The above asked question is from Deferred Correction for High-Resolution Schemes in chapter High Resolution Schemes of Computational Fluid Dynamics
For explanation I would say: The convergence problem of the high-resolution schemes paved the way for techniques of implementing high-resolution schemes that are more implicit such as NWF and DWF.