Given the fact "climate is the usual kind of weather in a location", what is the answer to the question or completion "How would a location's climate be determined?"

Select from the following.
(a). look at the weather many mornings, afternoons, and evenings in different seasons.
(b). look at the the most extreme weather events.
(c). look at the weather at noon only.
(d). look at the weather on one day.
(a).