Answer:
Boolean
Step-by-step explanation:
Boolean is one of the primitive data types that will only hold either true or false value. This data type is commonly used in a variable that will track a status with only two possible outcomes.
For example, the ParticipantPD field is to track the payment status (paid or unpaid) of a participant. So, declare the ParticipantPD field as boolean data type will meet its purpose.
boolean ParticipantPD = true;
or
boolean ParticipantPD = false;