The correct answer is: A. Capital and labour
A Cobb-Douglas production function is a mathematical function that describes the relationship between the inputs (capital and labor) and the output of a production process. The function is named after Charles Cobb and Paul Douglas, who developed it in the early 20th century.
The Cobb-Douglas production function is a widely used model in economics. It is used to estimate the relationship between inputs and outputs in a variety of industries, including manufacturing, agriculture, and services. The function is also used to make predictions about the future performance of an industry or economy.
The Cobb-Douglas production function is a simple but powerful tool. It can be used to understand the basic economics of production and to make predictions about the future.
The other options are incorrect because they do not accurately reflect the focus of the Cobb-Douglas production function. Option B, Labour and entrepreneur, is incorrect because the Cobb-Douglas production function does not explicitly consider the role of entrepreneurs. Option C, Land and labour, is incorrect because the Cobb-Douglas production function does not explicitly consider the role of land. Option D, Land and capital, is incorrect because the Cobb-Douglas production function does not explicitly consider the role of capital.