Spanish

chose the correct imperfect subjunctive form:

dudé que ellos lo

a. aprendiesen
b. aprendan
c. aprendas

A . Aprendiesen

That's how they said in Spain and is the only that sounds good

B. Aprendan

It depends if your learning Spanish the Spain way or Spanish from all the other countries

if your asking for what that says, it is

which of these words is an

but i don't know what sentence your asking for the adjective from.