The answer is A. Because and adjective describes the noun. An adjective can also have "ly" added to the word, for example you can make beautiful to beautifully. So for this sentence, A. is correct because the adjective (brightly) describes the noun (sun) and it also end's in "ly".
<span>I select character John Proctor who had an affair with Abigail and his marriage is at stake. John cannot decide whether or not he should confess to the affair to save his wife. John decides to die an innocent man than to live guilty of adultery and witchcraft.</span>
