The answer to your question is D.
La Niña, this is because it blows warm air into places like Australia and Indonesia causing wetter conditions than normal, while making places like the southwestern US much drier.
Ice ages and interglacial periods don’t happen frequently and there are rainy seasons in Australia every year.
And El Niño affects South America as it moves warm air East towards the Americas, not affecting the areas specified in the question.
I hope this helps!
