Question

Mis maestros ___________ (necesitar) papel

A) Necesitan

B) Necisitamos

C) Necesito


D) Necisitalis

Answer 1

A. Necesitan

Answer 2

Explain why @RicardoDelfin

Answer 3

Because, for regular verbs that ends in -ar
the 'ar' part changes to
yo(I): o
tu(you): as
el/ella(he/she), or it: a
nosotros(we): amos
vosotros(you guys): ais
ellos/ellas(them): an

In this case, the subject is 'mis maestros', which means 'my teachers'. This is third person plural(=them) so the verb has to be necesitan