In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

[Q]: Fact1: Echinoderms lack a centralized nervous system., Fact2: Sand dollars and sea biscuits are also echinoderms., Question: What lacks a centralized nervous system? (A) Damaged hearing (B) Humans (C) Horses (D) Sand dollars (E) insects (F) Chickens (G) Pesticides (H) barnacles
[A]: D


[Q]: Fact1: Sponges have specialized cells called collar cells., Fact2: Flagellum of collar cell cause current to pass over collar and food is collected., Question: Which aspect of a sponge's cells allow it to collect food? (A) the cervix (B) teeth (C) flagellum (D) cartilage (E) plasma (F) osculum (G) tissue (H) potassium
[A]: C


[Q]: Fact1: Some birds are pollinators that co-evolved with plants., Fact2: If the plant is green, it is a producer., Question: Some birds are pollinators that co-evolved with what other type of organism? (A) animals (B) humans (C) vegetation (D) producers (E) parasites (F) warm-blooded (G) Conifers (H) mammals
[A]:
D