A. It was a tough situation and Manasi was taking pains to make it better.
B. Slowly her efforts gave fruit and things started improving.
C. Everyone complemented her for her good work.
D. She was very happy and thanked everyone for their help.
(CAT 2004)
Statements A and D are grammatically correct. Statement B should be reframed as "Slowly her efforts bore fruit" Statement C is also incorrect. Its correct form would be "Everyone complimented her on her good work."