What are the principles that govern the structuring of grouping in perception?

I- Closure, which is the congruent complement of incomplete figures.
II- Proximity, which means that stimuli that are close to each other in space tend to be perceived as forming a single figure.
III- Similarity, which implies that similar elements are unified.
IV- Inclusivity, which is the masking of elements in the whole.
V- Pragnanz, which is the best organization of elements in the whole.
VI- Continuity, which means that continuous contours are better configured.
a) I, II, III, IV, V, and VI are correct.
b) Only II, III, IV, V, and VI are correct.
c) Only I, II, III, and VI are correct.