Which revision best eliminates wordiness in the following sentence?

"Marta was in total agreement with the student council's position and cast the deciding vote in favor of the rule."

A. Change "was in total agreement" to "agreed."
B. Change "cast the deciding vote" to "voted decidingly."
C. Change "student council's position" to "platform."
D. Change "in favor of the rule" to "in favor of change."