The sentence that is correctly construed with an independent clause and a dependent clause is A) As they examined the evidence afresh, they thought of a completely different explanation.
The other sentences don't have dependent clauses, only phrases.
Creo que si miras bien la respuesta la encontrarás sé que puedes sin ayuda
It looks is from the people that said that
The answer to your question is A- is
<span>Well, it allowed them to garrison more troops there which led to an increase in slave commerce for the Portuguese traders. </span>