In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Which of the following has a population of zero? (A) Merriam's elk (B) bison (C) llama (D) whooping crane
A

A person who wants to visit a desert will be sure to pack more (A) winter boots (B) thermal underwear (C) tan shorts (D) snowsuits
C

Amoebas have zero options and must preform (A) zero duties (B) most duties (C) all responsibilities (D) some duties

C