SA场景下，评估NR到LTE的系统间切换出成功率计算公式正确的是

A、IRATHO_N2E_SR = (IRATHO_N2E_Attempt/IRATHO_N2E_Success) × 100%
B、IRATHO_N2E_SR = (IRATHO_N2E_Success/IRATHO_N2E_Attempt) × 100%
C、IRATHO_N2E_SR = (Intra-RATHOInSuccess/Intra-RATHOInAttempt) × 100%
D、IRATHO_N2E_SR = (IRATHO_N2E_Success/Intra-RATHOInAttempt) × 100%