Question

1. what kind of source contains information gathered from interviews or diaries?

○ reference book
○ primary
○ secondary
○ periodical

Explanation:

Primary sources are original materials or firsthand accounts, like interviews (people's direct accounts) and diaries (personal firsthand writings). Reference books summarize existing info, secondary sources analyze/interpret primary sources, and periodicals are regular publications (like magazines) which aren't defined by being firsthand interview/diary info. So the source with info from interviews/diaries is primary.

Answer:

B. primary