Step 1: Understanding the sentence context.
The sentence states that although Rehman initially hesitated, his attitude toward contributing to the project never wavered. This means he remained firm and determined.
Step 2: Meaning of key words.
The blank must be filled with a word that indicates firmness, determination, or strong decision.
Step 3: Evaluating the options.
(A) ambivalence: Means mixed or contradictory feelings — this contradicts “never wavered.”
(B) satisfaction: Means feeling pleased — does not fit the context of determination.
(C) resolve: Means firm determination — perfectly fits the meaning of the sentence.
(D) revolve: Means to rotate or move around — grammatically and contextually incorrect.
Step 4: Conclusion.
The correct word is resolve because it correctly expresses Rehman’s firm determination despite hesitation.