It is not a preposition but it is a preposition A phrase
Answer: B The attitude of the speaker
Explanation:
If you read the vocab section at the beginning before you start reading, you will know what any of the words mean from the list, while reading the text.
So, let's say your vocab section has the word "joyous", and it's definition "very happy". When you read this before reading your text, you will not have to wonder what "joyous" means.
Does that make sense?
Also, put this into your own words, so you get full points.
Answer: "When the baby cried, his mother changed his diaper and fed him a bottle."