If x is an integer and 2.134 × 10^x is less than 210,000, what is the greatest possible value for x? Choose the correct choice from the following choices:
A) 7  B) 6  C) 5  D) 4  E) 3

Rationale: "21340 * 10 ^ - 4 * 10 ^ x < 210,000 , x = 4 because the next zero on the right side will make 21,340 > 210,000 answer d ,"
Answer: D