50. Which statement can be added to the end of this passage without disrupting its flow? (A) To further advance our understanding of L2 ultimate attainment, more methodologically appropriate research is needed. (B) Differential success and failure can co-exist in a learner’s language system. (C) Thanks to the advance in instructional technology, the discrepancy between native and near-native speakers’ competence can be minimized. (D) Non-native language system is often characterized by either divergence or indeterminateness at the performance level. (E) Native-likeness may be confined to tasks that tap L2 learning of grammar, lexis, and phonology.