The Mean Annual Income for People in a Certain City

The mean annual income for people in a certain city (in thousands of dollars) is 43, with a standard deviation of 29. A pollster draws a sample of 41 people to interview. What is
The probability that the sample mean income is less than 42 (thousands of dollars) ?

A) 0.3483
B) 0.4721
C) 0.5279
D) 0.4129