In compound sentence, there are two independent clauses that are joined using a coordinator. While in complex sentence, there are two or more clauses with one essentially an independent clause while there can be on or more dependent clauses. The difference between compound and complex sentence is that there is no dependent clause in compound sentence and at least there is one dependent clause in complex sentence.
Answer:
The media (including social media) has an important role in the fight against corruption as it can demand accountability and transparency from the public and private sectors.
Answer: c. pretended not to hear