Which sentence contains an antecedent that is unclear, missing, or confusing?

a.
i use online references because i can always find what i need online.

b.
he told my brother that some great deals can be found at the flea market.

c.
in the encyclopedia it says that english has words from many different languages.

d.
on the front page of the newspaper was a picture of my mom and me!

Ipronounced his name, offering him at the same time my hand: he took it, smiling and saying, “we shall do very well by-and-by.” then he laid me down, and addressing bessie, charged her to be very careful that i was not disturbed during the night. having given some further directions, and intimates that he should call again the next day, he departed; to my grief: i felt so sheltered and befriended while he sat in the chair near my pillow… (chapter 3) this passage, in which jane first meets the doctor, is an example of