Multiple Choice
Kwan checks her email for new messages several times during the day.She realizes that because emails are sent on a ________________ schedule,checking her email more frequently will not increase the number of new emails she receives in a day.Furthermore,she knows that she cannot predict when people will email her,but if an email has been sent to her,she will receive it the next time she checks.
A) fixed-ratio
B) fixed-interval
C) variable-ratio
D) variable-interval
Correct Answer:

Verified
Correct Answer:
Verified
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