Which one of the following is correct while segmenting consumer markets on demographic basis?

The correct answer is High predictability of consumer choice behaviour and low cost of measurement.

Key Points​High predictability of consumer choice behavior: Demographic factors are highly correlated with consumer preferences and purchase behavior. For example, younger consumers are more likely to purchase new and innovative products, while older consumers are more likely to purchase established brands.
Relatively low cost of measurement: Demographic data is widely available and relatively inexpensive to collect. This makes it a cost-effective way to segment consumer markets.
Demographic segmentation is a powerful tool that can help businesses to better understand their customers and develop targeted marketing campaigns. By understanding the demographic characteristics of their target market, businesses can identify their customers' needs and wants, and create products and services that appeal to them.