Directions: The sentence contains either a single error or no error at all. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct. If the sentence is correct, select choice (E). In choosing the answers, follow the requirements of standard written English.

The desire to be creative, (A) having new experiences, to escape boredom and (B) to realize unmet needs, all combine (C) to guarantee modifications (D) in the pattern of social life. (E) No error.