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").

[EX Q]: which of these formations are typically the highest point from sea level? (A) the sandy river bank (B) a long river channel (C) a cooled lava top (D) a lush green valley
[EX A]: C

[EX Q]: A plane travels through what? (A) gas layers (B) plains (C) oceans (D) time
[EX A]: A

[EX Q]: If a person is selling beads every day and then zero people choose to buy more beads, the seller will (A) make more money (B) have stalled income (C) increase profits (D) have more income
[EX A]:
B