What does the word Prefer mean? 

Correct alternative is B) 

'Prefer' way to love or pick out one issue in preference to another. E.g. I decide on pink wine to white. 'Selected' way to pick out a small variety of things. 'Like' way keen on something. 'Dislike' way now no longer liking something. 'Perfect' way with out fault. Thus, alternative B is an appropriate answer.