What Is a Defining Feature of the Role of the Learner

What is a defining feature of the role of the learner in a constructivist classroom?

A) The learner is valued as an active, important part of the knowledge construction process.
B) Learners are viewed as blank slates.
C) Learners are passive recipients of important content transmitted by the teachers.
D) Learners are expected to independently wrestle with ideas until they come to the right answer.