Select the word that means determined or strong-willed.
When the Allies stormed France in the D-Day invasion of June 5, 1944, altering the course of World War Il in their favor, there appeared to be a naive 14-year-old girl watching from the sidelines. However, her appearance was purposely deceptive. That
"young" girl was actually Phyllis Latour Doyle, a 21-year-old spy who was posing as a teenager while working for the Allies. Doyle had always been tenacious when it came to achieving her goals. She had learned how to parachute jump, scale buildings, and climb over roofs so that she could contribute to the Allied cause. In the weeks before D-Day, she repeatedly put her own life at risk in order to collect sensitive information, then secretly radioed the intelligence to the British military.