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").

Obstacles that might impede a dune are (A) God (B) emotions (C) cacti (D) cancers
C

Volcanoes, have a (A) Esophagus (B) Camels (C) Emotional experience (D) Cigarettes
A

Large metropolises can have a huge bedbug (A) sport team (B) water bill (C) dating pool (D) infestation

D