Answer:
b. Trespassing
Explanation:
Trespassing means to enter someone else's property without having permission or legal authority to do so.
According to law, for an act to be considered as trespassing, one of the criteria that must be fulfilled is the presence of a warning or notice.
In this case, trespassing charges may be filed against John because he ignored the barbed-wire fence which served as a warning sign to keep outsiders off the property.