The current sentence uses the incorrect idiom to credit x ... for y. The correct idiom is to credit x ... with y

• A. to credit x ... for y is not the correct idiom
• B. aving propelled is not the proper verb tense and should be replaced with propelling
• C. to credit x ... as y is not the correct idiom
• D. to credit x ... with y is the correct idiom; propelling instead of having propelled is also correct