Which among the following statements is true bout verification and validation of use case diagram? O a. All relationships should be shown on use case diagram as per the use case description. b. Very...

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Extracted text: Which among the following statements is true bout verification and validation of use case diagram? O a. All relationships should be shown on use case diagram as per the use case description. b. Very few diagram specific rules must be enforced. c. There can be many descriptions for each use case. d. The sequence of use case description need not match the sequence in the activity diagram.