Which of these statements about particulate matter less than 2.5 microns in diameter is true? A.) They can cause heart and lung disease B.) They're produced by nitrogen gas (N2). C.) They're less of a threat than particulate matter that's 10 microns in diameter. D.) They're the size of a human hair

You find a mysterious, dull substance on the ground and pick it up for a closer look. it is powdery, very light, and soft to the touch. the substance is most likely i. an organic mineral ii. a metallic mineral iii. a nonmetallic mineral i only ii only iii only i and ii i and iii

Terrence would like to reward himself after each goal he sets, but he's not sure what type of reward to choose. he's easily distracted and finds it hard to concentrate at times. which would be the best type of reward for terrence? a. a brief social network break b. a long nap c. a snack while he keeps studying d. watching a couple of tv shows

What are 4 factors and how do they impact elections ?