Your title depends on what your text and reasons are specifically about and what the information you are given is, however I would choose whichever one fits your information the best. However, they all are talking about bicycles. I would most likely choose the health benefits of bicycling.
Exposition
is your answer :D
The correct answer is probate.
Probate is the term for the procedure in which a will is proven valid. Once proven valid, the will becomes a public document. After probate, a valid will is recognized as the deceased's last will and testament.