Does the sentence "Mild zinc deficiency depresses immunity, although excessive zinc does also." provide a valid answer to the question "What is a symptom of both zinc deficiency and excess?"

A: yes

Does the sentence "According to Chinese sources, the North Koreans donated 2,000 railway cars worth of materiel while thousands of Koreans served in the Chinese People's Liberation Army (PLA) during the war." provide a valid answer to the question "How much material did the North Koreans give to the Chinese communists?"

A: yes

Does the sentence "A joint venture with Google will digitize and offer NARA video online." provide a valid answer to the question "What is the aim of NARA in entering public-private partnerships?"

A: no

Does the sentence "Coastal and delta regions have an average maximum temperature of 32 C (89.6 F)." provide a valid answer to the question "How warm does it get at the height of summer along the in the delta and coastal regions of Burma?"

A:
yes