I think B or C. I vote for C
Gonna have to agree with the Curlmeister on this one.
"Impact", although common used as a verb, should properly be used in general as a noun (only teeth are impacted).
IN addition, the idiom "probability of" is correct so E is my choice for the answer.
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993