the answer is subjective. i personally agree with the first answer for this question.
if one isn't strictly talking about objects then the correct answer would be 'my eyes' since according to this riddle i am asleep and in order to answer/open the door i need to open my eyes first of all.
however, if one is specifically looking for an object, then the first thing i would open would be the door
hope this !
i dont kmow it? !