The correct option is C Praised
The word 'applauded' refers to showing approval or praise by clapping.
Option A, disapproved refers to having or expressing an unfavourable opinion.
Option B, misunderstood refers to incorrectly interpreting or understood.
Option C, praised refers to expressing warm approval or admiration of something.
Option D, welcomed refers to greeting someone in a polite or friendly way.
Thus, according to the meaning, the word 'praised' is the opposite of the word 'applauded'.