Can someone help me?

A. Because it'll have the most useful info because it was written right after it sank so it will have the most true info and movies end up stretching the truth and Legos won't tell us anything about what happened. So, A book about the titanic written after it sank is most reliable

Primary sources provide a first-hand account of an event or time period and are considered to be authoritative. They represent original thinking, reports on discoveries or events, or they can share new information Primary sources are original materials, regardless of format. Letters, diaries, minutes, photographs, artifacts, interviews, and sound or video recordings are examples of primary sources created as a time or event is occurring.

Explanation: so i cant tell you the answer but i can tell you what its asking you hope i helped dont forget to give me thanks and vote bye have a good day and good luck

6. true

hiv/aids are in fact really common in blood types

this is b. how railways dealt with people riding the trains without paying