Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.
Generation gap refers to a vast difference in cultural norms between a younger generation and their elders. It’s a distressing thing for the phenomenon ___(1)___ occurs around the world. The ___(2)___ of communication, different views on certain problems and different attitudes towards life may cause the generation gap or even widen it. First, one of the major factors for this misunderstanding between two generations is that parents and children lack communication. Young people ___(3)___ reveal their feelings to their parents, and often complain that their parents are out of ___(4)___ and that they talk too much about certain problems. So when young people meet some problems, they would rather ___(5)___ to their classmates or their friends for help. The lack of communication widens the generation gap.