The correct option is B More demand for the tertiary sector
The development of agricultural and industrial sectors creates a great demand for services like transport, trade, and storage. Greater the growth of the primary and secondary sectors, higher the demand for the tertiary sector.
For example, the primary sector produces goods and sends the same to the secondary sector. When the production is finished, the product is sent for storage via truck. Thus, we can see that storage, which is a service of the tertiary sector, is created due to the development of the primary and secondary sectors.