Read the following paragraphs and answer the question.
By 1890, domestic science courses were being offered widely in American public high schools, as well as in colleges and universities. These courses included instruction in cooking, sewing, home decoration, home sanitation, home hygiene, home nursing, etc. The teaching of domestic science in the secondary schools led to a demand for the training of home economics teachers in the colleges. However, the major emphasis on home management remained until the early part of the 20th century.
What can be inferred from this paragraph?（）
A、
People could make a lot of money by teaching home economics.
B、
People should pay more attention to home management.
C、
Too many domestic science courses were offered.
D、
Home economics teachers were greatly needed.
【正确答案】：D
【题目解析】：
由第一句可知，由于高中广泛开设home economics 的课程，所以需要大量的教师。