Answer:
Compound sentence.
Explanation:
A compound sentence contains at least two independent clauses (with no dependent ones; if there is a dependent clause included, then it is a compound-complex sentence). There are two independent clauses in the sentence above: <em> Its proprietor, Roderick usher, had been one of my boon companions in boyhood </em>AND <em>but many years had elapsed since our last meeting.</em>
There are no dependent clauses here - both clauses are independent and can exist on their own.
Since 'next' is a time-order word, you need another.
'Then' is a time-order word. You are not stating a 'fact', nothing happened abruptly, or 'suddenly', and you aren't comparing anything, 'similarly'.
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According to the text, one reason that the novel was not immediately accepted by literate society was that early novels were seeking working-class <span>readers.</span><span> The statement presented is True. It talks about the reasons why novel(s) are not immediately accepted by literate society.</span>