GMAT Critical Reasoning (CR) | Re: Spokesperson: In the 2006 election of the city mayor, 55% of

Spokesperson: In the 2006 election of the citymayor,55% of the voters were female. All the voters were between ages 18 and 70 and 2/3 of them supported the incumbent mayor. The incumbent mayor won the election with a substantially greater number of votes than any other candidate.

If the statements made by the Spokesperson are true, then which of the following must be true?

a.At least 1/2 of the female voters supported the incumbent mayor.
b.The incumbent mayor received stronger support