The answer is b. Susan has an appointment with he co-worker on the first Monday of every month. This scenario would benefit from being set up as a recurring appointment, since it requires the same thing to be done every month on the same day. Susan is likely to forget this appointment every month, so a reminder like this would be useful for her. For the other cases, a recurring appointment would not be of much benefit since they do not follow a particular pattern time-wise.
B. Integer I think that’s the answer
