Select the correct text in the passage.
Which detail from the paragraph supports the inference that Clarke had fewer professional opportunities because she was female?

[5] Degree in hand, Clarke began to look for permanent work as an electrical engineer. Unfortunately, she was unable to find an engineering position, so she settled in at General Electric (GE) as a "computor." There she worked in a separate women's division within the Turbine Engineering Department, training and supervising women who calculated the mechanical stresses in turbines. While working [at General Electric (GE)], she filed for her first patent, for a graphical calculator used to solve electric power transmission line computations. Frustrated that she was not a salaried engineer at GE, Clarke took time off for a position at Constantinople Women's College in Turkey in 1921. There, she combined her love of travel with the more practical work of teaching physics to eager young women. When her contract ended, she took four months to travel in Europe, spending time in Austria, Germany, Holland, and England. In 1922, Clarke returned to General Electric and, at the age of thirty-nine, finally got a full-time position as an electrical engineer. She found the work so compelling that she stayed until retirement in 1945.