i need a little help I'm stuck between b and c idont know which one i choose
choose the sentence which does not mean the same as the main sentence 
(4) Heavy rain is common in this area at this time of year. 
a- There is often bad weather here at this time of year. 
b- At this time of year there are occasional storms around here. 
с- In this region rain is frequent at this time of year.