C) otherwise is the answer.
B because it is very logical
C. He was a steamboat pilot. As a child he loved to watch the schooners. Once he was older, he became part of a crew.
This is what the dictionary says:
al·lu·sion<span>əˈlo͞oZHən/</span>nounan expression designed to call something to mind without mentioning it explicitly; an indirect or passing reference."an allusion to Shakespeare"<span>synonyms:<span>reference to, mention of, suggestion of, hint to, intimation of, comment on, remark on"the town's name is an allusion to its founding family"</span></span>the practice of making allusions, especially as an artistic device.
Its something to do with referencing something
Are those three separate words or is it one word you seperated into three parts?