Improve the grammaticality: This implies that automobile companies had to pull in large sums of money for research and development work to create and promote the sales of such cars.
The research and development work was done by the automobile companies to create and promote the sales of the cars.
Corrected: The research and development work was done by the automobile companies to create and promote the sales of the cars.
Corrected: The research and development work was done by the automobile companies to create and promote the sales of the cars.
Corrected: The research and development work was done by the automobile companies to create and promote the sales of the cars.
Corrected:
The research and development work was done by the automobile companies to create and promote the sales of the cars.
Corrected: The research and development work was done by the automobile companies to create and promote the sales of the cars.
Corrected: The research and development work was done by the automobile companies to create and promote the sales of the cars.
Corrected: The research and development work was done by the automobile companies to create and promote the sales of the cars.
Corrected: