The more she practices, _____________ she becomes.
the greater confidence
the more confident
the most confident
The more she practiced, the more confident she became.
Consider the answers:
A. the greater confidence → Because of the structure become + adj, confidence is false
B. more confident → lack of the article and false confident (after become + adj)
C. the more confident → Double comparative structure when talking about 2 people or things:
The more/-er + S + V, the more/-er + S + V
D. the most confident → Wrong double comparison structure