Answer:
The correct answer is a. Plasticity
Step-by-step explanation:
Brain plasticity or Neuroplasticity is defined as the brain's functional and structural ability to modify and adapt to changes usually related to brain damage in order to recover the function of the damaged parts by reorganizing pathways, creating new connections and in some cases creating new neurons. Therefore, Brendan's neurologist basis this diagnosis on this theory because of the assumption that the functions of the damaged part will be assumed by other well-funcitioning areas so he will be able to speak or understand language, that Neuroplasticity is based on.