Which plot event in "Object Lesson, Part 2" creates a feeling of tension or anticipation about the case for the reader?

A Ellery wiping his neck with his handkerchief
B Ellery reaching into his pocket for his pipe and tobacco
C Ellery asking Dave about Mr. Mueller's baked goods
D Ellery returning the wedding gift fund to Miss Carpenter

the answer to the question is a

the whisper is the answer, hope this : )

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 !