Final answer:
Direct foreign investment gives a company the most control and potential for high returns through a long-term and managerial involvement in the foreign entity.
Step-by-step explanation:
The mode of foreign market entry that offers the most control and the highest potential return for a company is direct foreign investment. This approach involves purchasing more than ten percent of a company and typically includes assuming some managerial responsibility. As compared to other forms such as exporting, joint ventures, contractual agreements, and strategic alliances, direct foreign investment allows for a more long-term focus, significant control over operations, and potential for higher returns, albeit with a greater investment of time and resources. Planning and carrying out a transaction for direct foreign investment can take a considerable amount of time but offers substantial rewards for those willing to make the commitment.