What is the lecture mainly about？A．Why some newspapers do not improve their servicesB．What

What is the lecture mainly about？

A．Why some newspapers do not improve their services

B．What newspapers can do to increase their readership

C．Why local newspapers cannot compete with major newspapers

D．How the topics that interest readers have changed over the years

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！