I understand this question now. I typed it up already so....
maybe it'll help somebody.
"In a galvanic cell, the Ereduction + Eoxidation must be greater than 0 volts. If Eoxidation is greater than 0 volts, the overall voltage is positive so choices B and D are galvanic cells an are eliminated. The only way that Ecell can be less than 0 when Ereduction is positive is when Eoxidation is a negative value with a magnitude greater absolute value than Ereduction. The best answer choice is C."
maybe it'll help somebody.

"In a galvanic cell, the Ereduction + Eoxidation must be greater than 0 volts. If Eoxidation is greater than 0 volts, the overall voltage is positive so choices B and D are galvanic cells an are eliminated. The only way that Ecell can be less than 0 when Ereduction is positive is when Eoxidation is a negative value with a magnitude greater absolute value than Ereduction. The best answer choice is C."