You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Q: Paragraph: The more tightly packed the particles inside the material are, the more dense we say they are.
Question: Sasha is throwing bottles into the lake. Some bottles are filled with sand, and some only have a tiny bit of sand in them. The bottles with a tiny bit of sand will sink last because they are
Choices: A)less dense
B)more dense

A: less dense
****
Q: Paragraph: If we have two materials with the same volume, the material with a higher mass will be more dense.
Question: Tanya has a substance with mass 10kg. Logan has a substance with mass 5kg. If both substances are the same size, who has the less dense substance.
Choices: A)Tanya
B)Logan

A: Logan
****
Q: Paragraph: Pigments in the skin act like a filter that can prevent the skin from making vitamin D. As a result, people with darker skin need more time in the sun than people with lighter skin to make the same amount of vitamin D.
Question: Caucasian Americans have lighter skin than other Americans. Researchers were not surprised to discover therefore, that vitamin D insufficiency among Caucasian Americans is _____ than among other Americans?
Choices: A)more prevalent
B)less prevalent

A:
less prevalent
****