It's a strong inclination of the mind or a preconceived opinion about something or someone. A bias may be favorable or unfavorable.
Lapicero (liviano,pesado,grande,pequeño)
Mascota ( travieso, esponjoso, adorable)
Escuela ( importante, Grande, Educativo)
Libro ( El libro antiguo)
The answer for this is that the question mark goes after "What have they accomplished so far" or B.
Hope this helps,
kwrob
