The correct option is D Strong
Option C)strong is correct as it means having the power to move heavy weights or perform other physically demanding tasks and best suits the given sentence. The other options are wrong as silly, shy, and intelligent mean having or showing a lack of common sense or judgement; absurd and foolish, nervous or timid in the company of other people, and having or showing intelligence, especially of a high level respectively. The correct answer is C)strong.