Controlling inflation is more important than controlling unemployment. (this one is fine)
My personal opinion on this is that it's a bit misleading economically. You cannot, in the long term, trade unemployment for inflation--that's the myth of the Phillips Curve which the stagflation of the 1970's disproved.
You can have lower inflation in the long term by having higher unemployment in the short term (1981-1982 recession), or lower unemployment in the short term by having higher inflation in the long term (60's boom, 70's inflation)...but there's really no long-term tradeoff. So the question seems a bit antiquated to me.