通过日志可以更好地定位问题，x2openEuler日志路径是？

A、 /usr/local/x2openEuler/src/portal/logs/backend/
B、 /usr/local/x2openEuler/portal/src/logs/backend/
C、 /usr/local/x2openEuler/portal/logs/backend/
D、 /usr/local/x2openEuler/src/logs/backend/