It is important to recognize prompts for compare/contrast essays. Please select from the following choices the one that fails to include such prompts.
选项：

A:Would you prefer to work for a higher salary and spend less time with family, or earn less money and spend more time with family?;
B:People may have different opinions towards distance learning. Discuss their views and give your own opinions.;
C:Some people prefer to live in a large city, while other people prefer small towns. Explain your own preference by describing the advantages and disadvantages of each.;
D:---