Given Only the Following Excerpt of an E-R Model

question 58

Multiple Choice

Given only the following excerpt of an E-R model:
If one instance of ENTITY B must be related to one and only one instance of ENTITY A,and one instance of ENTITY A may be related to many instances of ENTITY B,which of the following should be written on the end of the relationship line next to ENTITY B in the figure above?

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Definitions:

Depression

A common but serious mood disorder featuring persistent feelings of sadness, hopelessness, and a loss of interest or pleasure in daily activities.

Recurrent Heart Attacks

Experiencing multiple episodes of myocardial infarction, which is the interruption of blood supply to a part of the heart, causing heart cells to die.

Mortality

The state of being subject to death; often used in statistics to refer to the rate of death in a population.

Catecholamines

A class of neurotransmitters that includes dopamine, norepinephrine, and epinephrine, playing important roles in the body's stress response and emotional arousal.