Question 2 of 43 in this topic
Difficulty: EasyVocabulary In Context
Beginning in the 1950s, Navajo Nation legislator Annie Dodge Wauneka continuously worked to promote public health; this _______ effort involved traveling throughout the vast Navajo homeland and writing a medical dictionary for speakers of Diné bizaad, the Navajo language.
Which choice completes the text with the most logical and precise word or phrase?
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