The word 'predominant' indicates 'having control or power,' as in 'a dominant ruling party.' We must find a synonym or a word that has a comparable meaning to it.

'important' denotes 'of considerable significance or value,' as in 'an important ruler.' As a result, it is a synonym, and option B is accurate.

'Subordinate' is the inverse of dominant, meaning 'of less importance or worth,' hence it is not a synonym.

The word 'secondary' has the reverse meaning: less important than.

Similarly, the term "inferior" indicates "lower in rank or skill."

As a result, alternatives A, C, and D are erroneous.