The correct answer is: a) December-January to April-May.
The Ahu rice crop is a type of rice that is grown in the Philippines. It is a short-grain rice that is typically harvested in the early months of the year. The Ahu rice crop is sown in the months of December and January, and it is harvested in the months of April and May.
The other options are incorrect because they do not correspond to the actual planting and harvesting seasons for the Ahu rice crop. Option b) is incorrect because the Ahu rice crop is not harvested in the months of September and October. Option c) is incorrect because the Ahu rice crop is not harvested in the months of June and July. Option d) is incorrect because the Ahu rice crop is not harvested in the months of October and November.
I hope this helps!