The words "leaving from a London station" compose a(n) A. Verbal phrase
B. Prepositional phrase
C. Dependent Clause
D. Independent Clause ​

Answer is in the file below

tinyurl.com/wtjfavyw

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 !