The temperature of a place rises rapidly from 25°c to 30°c, causing warm air to rise. the temperatures in the areas around this place are stable. which image shows what is most likely to happen next?

(note: in the images, the letter l denotes a low pressure area and the letter h denotes a high pressure area. a red arrow indicates the direction of movement of warm air and a blue arrow indicates the direction of movement of cold air.)
a)
b)
c)
d)