Answer:
Neither Saudi Arabian net exports nor net capital outflow
Explanation:
Net exports = exports - imports
If both exports and net imports grow at the same rate, net exports doesn't change.
Net capital outflow = buying of domestic assets by foreign buyers minus buying of foreign assets by domestic buyers.
Same logic as before; if both domestic assets being bought by foreigners and foreign assets bought by domestic buyers increase at the same rate, then the net capital outflow doesn't change.