The correct answers appear below the choices in green.

Area A is a high pressure system over the Atlantic Ocean. The presence of stratocumulus cloud and the slow movement of the cloud in the animations shows that anti-cyclonic rotation is occurring.

Area B is a high pressure system over the southern parts of Africa. The clear skies and cloud-free environment are a testament to this.

Area C is a low pressure system. In fact, it is a cold front that's moving away to the south-east. In the animations, you can see the cold air cumulus cloud moving up from the south with a slight cyclonic rotation.

Looking at the night microphysical animation below, the cold air cumulus presents as pale pink clouds over the southern part of the Indian Ocean, south-east of South Africa. These clouds move in a cyclonic fashion with time. They have fairly warm cloud top temperatures and there's a small possibility of rain or light showers accompanying them. The cold front found ahead/east of this cold air cumulus is depicted by the deep precipitating red cloud band in the far south-east part of the image.