Examine the Following Context Diagram and the Related Level 0

question 20

Multiple Choice

Examine the following context diagram and the related level 0 logical data flow diagram.Which of the following statements is true?

• A)The data flow diagrams are prepared correctly.
• B)A context diagram must have a least two external entities.
• C)The logical data flow diagrams are not balanced.
• D)The logical data flow diagram must have 5 to 7 processes.

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Definitions:

Costimulation

A process in immunology where an additional signal provided by one immune cell enhances the activation or survival of another, leading to an effective immune response.

Immune Response

The immune response is the body's defensive reaction to substances or organisms that are identified as foreign or harmful.

B Cell

Type of lymphocyte responsible for antibody-mediated immunity.

T Cell

Thymus-derived lymphocyte of immunologic importance; it is of long life and is responsible for cell-mediated immunity.