SAT Question 06b96bfc: Words In Context answer and explanation

English - Words In Context - Fill In Blank Multi Word Phrase
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A musician and member of the Quechua of Peru, Renata Flores Rivera was eager to promote the Quechua language in her music, but she was ______ speaking it. She met this challenge by asking her grandmother, a native speaker of Quechua, to help her pronounce words in her song lyrics and also by taking classes in the language.
7
Difficulty:Easy
Which choice completes the text with the most logical and precise word or phrase?