if net exports are positive, then group of answer choices net capital outflow is positive, so foreign assets bought by americans are greater than american assets bought by foreigners. net capital outflow is positive, so american assets bought by foreigners are greater than foreign assets bought by americans. net capital outflow is negative, so foreign assets bought by americans are greater than american assets bought by foreigners. net capital outflow is negative, so american assets bought by foreigners are greater than foreign assets bought by americans.