Qustions 1-5 are based on Text B, please choose the best answer to each of the following questions:What makes it difficult for strangers from different countries to become friends?

A、They don't expect subtle differences of what constitutes friendship.;
B、They can't talk with each other because they speak different languages.;
C、They think people from other countries may fail to appreciate friendship.;
D、They think people from different countries have different ideas about friendship.