Which of the following scenarios provide evidence for Newton's second law of motion? Select all that apply. A. Pushing a full wheelbarrow is harder than pushing an empty wheelbarrow.
B. A group of balanced forces on a table cause it to remain at rest.
C. The force of gravity is stronger on an object with more mass to cause the same acceleration.
D. The friction of ice causes a hockey puck to come to a stop.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.