You are given a science question (hard-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

[Q]: What causes a ship carrying heavy cargo to take more time to come to a stop than an identical ship carrying lighter cargo if both ships are traveling at the same speed?
(A) increased friction (B) greater momentum (C) greater acceleration (D) more constant velocity
[A]: B

[Q]: Which situation is an example of an inherited trait?
(A) lions preying on zebras (B) monkeys using twigs to get food (C) birds following migratory patterns (D) bears opening coolers at campsites
[A]: A

[Q]: Leaves fall from deciduous trees onto the forest floor. These leaves decay slowly and become part of the topsoil. Which change is most likely to have a positive impact on the nutrients available in the topsoil?
(A) a decrease in temperature (B) a decrease in biodiversity (C) an increase in the number of predators (D) an increase in the number of decomposers
[A]:
D