Age Category (in years) Number of Employees
Less than 20......................29
20 - 29 ..........................58
30 - 39 ..........................36
40 - 49 ..........................21
50 - 59 ..........................10
60 - 69 ...........................5
70 and over........................2

There are 161 employees at Company X. The above table shows the age category of all the employees. According to the table, if m is the median age, in years, of the employees at Company X, then m must satisfy which of the following?

A. 20 ≤ m ≤ 29
B. 25 ≤ m ≤ 34
C. 30 ≤ m ≤ 39
D. 35 ≤ m ≤ 44
E. 40 ≤ m ≤ 49
Answer: A

hOW do I approach this