Correct Answer: difficult

Solution : The correct choice is the first option.

In this context, difficult is appropriate because it directly conveys the idea that the presence of technical terms and foreign words adds complexity and makes the text harder to understand.

The meanings of other options are as follows:

• Futile means producing no result or effect.

• Stagnant means not flowing or moving, often used to describe a lack of progress or development.

• Feasible means capable of being done or accomplished.

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Therefore, the complete sentence is: "The technical vocabulary and foreign words make this text a little more difficult ."