ব্যাখ্যা
The correct answer is option (d) "talking too much."
'Garrulous' means excessively talkative, especially about trivial matters.
Synonyms: talkative, loquacious, verbose, chatty, long-winded.
✗ Speechless/wordless = unable to speak (the opposite of garrulous).
Sentence: 'The garrulous old man kept talking for hours without pause.'
Source: Merriam-Webster Dictionary.