TASK DEFINITION: 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.
PROBLEM: Adaptive characteristics that help dolphins survive life in the ocean include all of these except  
 (A) their sleek skin. (B) swimming very fast. (C) their body shape. (D) traveling alone.

SOLUTION: D

PROBLEM: Which of the following activities should be omitted from scientific inquiry?  
 (A) changing data to fit expected results (B) designing and carrying out investigations (C) formulating detailed hypotheses (D) communicating results to others

SOLUTION: A

PROBLEM: Which of these behaviors does a dolphin learn?  
 (A) eating small fish (B) swimming in salt water (C) balancing a ball on its nose (D) breathing though its blowhole

SOLUTION:
C