$($a$)$ What are the advantages of using a fixed$-$alternative poll question on Facebook?

$($b$)$ When do you think it would be better to use an open$-$ended question?

$($a$)$ If you had a limited budget and two weeks to decide which two flavors to put into quantitative testing, would you choose a "poll only" or a "cont only strategy? Why? $($b$)$ If you had a sizable budget and two months to make the same decision, which scenario would you ehoose? Why?