Directions: The given sentence is divided into four parts A, B, C, and D. Choose the part that contains an error as your answer. If the sentence is error-free, mark 'No error' as your answer.

The entrepreneur's achievements were a culmination of unyielding determination, (A) calculated risk-taking, and tireless innovation, all of which underscored (B) his ability to navigate the complex landscape of business (C) with a blend of creativity and strategic acumen. (D)