Mashaal Masha
Ablation Rates for Three Elements in Cosmic Dust, by Dust Source
Element SPC AST HTC OCC
iron 20% 28% 90% 98%
potassium 44% 74% 97% 100%
sodium 45% 75% 99% 100%


Earth's atmosphere is bombarded by cosmic dust originating from several sources: short-period comets (SPCs), particles from the asteroid belt (ASTs), Halley-type comets (HTCs), and Oort cloud comets (OCCs). Some of the dust's material vaporizes in the atmosphere in a process called ablation, and the faster the particles move, the higher the rate of ablation. Astrophysicist Juan Diego Carrillo-Sanchez led a team that calculated average ablation rates for elements in the dust (such as iron and potassium) and showed that material in slower-moving SPC or AST dust has a lower rate than the same material in faster-moving HTC or OCC dust. For example, whereas the average ablation rate for iron from AST dust is 28%, the average rate for _______

Which choice most effectively uses data from the table to complete the example?
Difficulty: Hard
A: 

iron from SPC dust is 20%.

B: 

sodium from OCC dust is 100%.

C: 

iron from HTC dust is 90%.

D: 

sodium from AST dust is 75%.