If x is an integer and 2.134 × 10^x is less than 220,000, what is the greatest possible value for x?
Pick one
A) 7  B) 6  C) 5  D) 4  E) 3

Rationale: "x is an integer and 2.134 × 10 x is less than 220,000 , what is the greatest possible value for x ? for 2.134 × 10 x is less than 220,000 to remain true , the greatest number is 213,400 , which makes x = 5 c . 5"
Answer: C