Answer:
The correct answer is c.Moscow
Explanation:
The isobars in this place are far apart, there is a large space between isobars comparing to other cities, so this means, that in the city of Moscow the resulting winds would be very light.
When isobars are spaced far apart then the pressure changes more gradually over distance and thus the wind speed is weaker.
For more information regarding this topic, please read the book Encyclopeida of Athmospheric Sciences