Given below is a set of four sentences, and when properly sequenced, they form a coherent paragraph. Arrange the sentences in the correct sequence.

A. Gradually, the company expanded its reach globally and became a leader in the tech industry.

B. Established in 1969, TechnoWorld started as a small firm with big ambitions.

C. By investing in research and development, the company introduced innovative products that captivated the market.

D. Their first product, a portable radio, was a hit and set the pace for their success.