Select the most appropriate option to fill in the blank.

My grandfather was a farmer and he ___________three acres of land.

cultivated

The most appropriate option to fill in the blank is cultivated.

The word "cultivated" means to prepare and use land for growing plants for food or to sell. In this context, it makes sense to say that the grandfather cultivated the land, as he was a farmer and would have been growing crops on the land.

The other options are not as appropriate. The word "advanced" means to make something more developed or sophisticated. This does not make sense in the context of the sentence, as the grandfather was not making the land more developed or sophisticated. The word "grown" means to cause something to grow. This does not make sense in the context of the sentence, as the grandfather was not causing the land to grow. The word "cultured" means to refine or improve something through education or training. This does not make sense in the context of the sentence, as the grandfather was not refining or improving the land through education or training.