Mariana is a fifteen-year-old English learner who can read in her home language but not in English yet. Mariana's teacher can BEST approach her English language and literacy instruction by ______.
options:
a) selecting a language and literacy program designed for elementary students
b) leveraging her language and literacy strengths in her home language
c) researching which language and literacy gaps most often appear at her age
d) providing opportunities for direct instruction in her home language