Which sentence contains a misplaced modifier?
A. The trail up the mountain winds alongside a rushing stream.
B. During the climb, Mr. Swanson slipped on a loose rock up a steep hill.
C. By late afternoon, they arrived in a meadow and set up camp.
D. The Swansons sat on a rock beside the stream and had a snack.
(I really need fast help. I don't understand this)
A. The trail up the mountain winds alongside a rushing stream.
B. During the climb, Mr. Swanson slipped on a loose rock up a steep hill.
C. By late afternoon, they arrived in a meadow and set up camp.
D. The Swansons sat on a rock beside the stream and had a snack.
(I really need fast help. I don't understand this)