The clue word "however" almost always indicates a "contrast". This is because when using this word, the writer can on one hand agree with what he or she is saying, but offer a different point of view to be considered.
A so it follows the story (but i guess you could also use B at the same time)
Answer:
THE CONSONANTS OF ENGLISH. Sound. Examples. /p/ pair, cup. /b/ bad, crab. /t/ tall, hit. /d/ dark, head. /k/ cab, lack. /g/ good, tag. /f/ fine, wife. /v/ very, above.
