What is the main idea of the text?
a. The Quimbaya people were known for their vast agricultural practices in the Coffee Cultural Landscape.
b. The Quimbaya people were skilled gold and copper artisans, creating valuable and intricate pieces with unique designs.
c. The Quimbayas primarily engaged in the production of pottery and ceramics in their daily activities.
d. The Quimbayas are recognized for their advanced techniques in agriculture, including irrigation and crop rotation.