Choose which portfolio is the optimal risk-return relationship if your client's return preference is greater than 5%. WMT stock 1 stock 2 returnp o, Op WMT ORCL 5.80% 0.036% 1.892% WMT PFE 4.60% 0.031% 1.772% WMT FSEAX 7.90% 0.029% 1.714% BSV 4.90% 0.021% 1.461% WMT SP500 5.50% 0.033% 1.804% O WMT, ORCL O WMT, FSEAX O WMT, SP500 O WMT,PFE