A. The gallery displays two oil portraits that belong to the Venetian school of painting; the subjects of the paintings remain unknown.
The most reliable sources for a research paper are:
1. A source about World War 2 written by a well-respected historian
2. A source about smartphones written earlier this year
The qualities to look for in reliable resources are:
1. It should be written by a person of integrity like someone who specialized in the topic, or an esteemed professor.
2. It should be relevant and up to date. If it is writing about something that is modern, or relevant to the present, then it should've been published recently.
The two statements above have these qualities. That's why they are reliable.
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