If 1,000 microns = 1 decimeter, and 1,000,000,000 angstroms = 1 decimeter, how many angstroms equal 1 micron?  Choose the most appropriate option:
A) 1,000
B) 100
C) 1 , 000,000
D) 10
E) 10,000

Rationale: "given that 1,000 microns = 1 decimeter = 1,000 , 000,000 angstroms so , 1 micron = 1,000 , 000,000 / 1,000 = 1 , 000,000 answer : c"
Answer: C