Are you a Christian?
If you're asking me, then I guess the answer is "Yes". At least in my opinion.
But here's the real question, if you are interviewing me for a job. Do you consider me to be a Christian?
As some who call themselves "Christian" have strange ideas about the Catholic Church and its beliefs and may not regard me as "Christian", if I'm asked this question at an interview I'd probably do what this guy did and inform you up front that I'm a Catholic and let you decide. That doesn't meant that I'm being evasive. It simply means that I'm unsure as to how you define the term Christian and I'm leaving it to you to make the call. The term "Christian" in common usage, often means "non-Catholic", so there is some ambiguity here.
Having said that, I think the Salvation Army has a right to hire whomever it pleases. If they don't want Catholics, that's their prerogative.
Yes, just as I answered in Number 14.