Well if they have ISP flow logs, that'll be trickier because it will enable very granular inspection of the traffic and the timings of that traffic.
However if they are trying to cast a wide net and inquire Google and other service providers for it, that will lead to a lot of collusions and they won't be able to tell it is from country A because it is from the VPN.
However if they are trying to cast a wide net and inquire Google and other service providers for it, that will lead to a lot of collusions and they won't be able to tell it is from country A because it is from the VPN.