Ili kujifunza lazima iwe na kitabu sahihi, kufanya kazi kwa ufanisi ni nini lazima mtu awe nacho? 
Choose an answer to this question from the following options:

A: jiboreshe
B: kuwa na zana
C: kuwa mwenye ujuzi
D: kuendelea
E: kuwa na maarifa zaidi
The right answer is B