Question: It's quite common for birds feeding on seeds from flowering trees in some tropical waters to get weighed down, pricked and even entangled in the branches because

  Options: 
 A. seeds sprout better on the ground
 B. smooth seeds need water to reach other islands
 C. the seeds have a thick, sticky coating with hooks
 D. scavengers also hunt for seeds with mucousy coatings
Answer: C