State Candidate X's Headquarters Has Had Local Groups Run Polls

State candidate X's headquarters has had local groups run polls in large cities. In City A, 486 of 900 voters polled said that they would vote for X. In City B, 56 of 100 voters polled said that they would vote for X. Headquarters has some more money to spend on advertising in City A and/or City B, and they think they should do it in City
A. However, they have decided to consult you. Should they spend more campaign money in City A or City B? Explain.