Final answer:
Jean Jackson is an anthropologist known for her research on Colombian indigenous movements and has not studied urban expansion in Brazil, but her work includes a significant focus on indigenous peoples, with additional publications on missionaries and rights-claiming discourse.
Step-by-step explanation:
The claims about Jean Jackson in the student's question do not align perfectly with her actual research focus. Based on provided resources, it is not evident that Jean Jackson studied the expansion of cities in Brazil, which is a statement that is not true. Jackson has indeed published significant work related to indigenous movements, particularly in Colombia, and has field experience in that region. Her book, 'The Fish People: Linguistic Exogamy and Tukanoan Identity in Northwest Amazonia,' delves into the lives and culture of indigenous peoples.
Moreover, she has contributed insightful essays about topics such as missionaries, the Colombian conflict, and rights-claiming discourse. This book explores the linguistic exogamy and Tukanoan identity in Northwest Amazonia. While the other options may be true for other anthropologists, they are not true for Jean Jackson specifically.