7361. The police need tangible proof of his guilt before they can act against him.

✅ The correct answer is option D.
Convincing : capable of causing someone to believe that something is true or real.

Strong : having the power to move heavy weights or perform other physically demanding tasks.

Emphatic : expressing something forcibly and clearly.

Clear : easy to perceive, understand, or interpret.

Tangible : clear and definite; real.

Synonym of Tangible is Clear