I tried to message you, but you've got incoming messages turned off.
Remember that a J2ME application will be running on a micro-device like a cell phone or personal organizer. Would you want to type out "Gone with the Wind" on a cell phone? Probably not. So, a word processor wouldn't be a good candidate for a micro device.
What about a little game? Perfect! I can't tell you how much time I've played a stupid little game on my cell phone while I'm in the airport waiting for a flight.
What about remote data collection? What they're talking about here is perhaps one of those people that come by your house and read the
water meters. A micro device working on some custom, handheld device is probably all they need. They can walk up to your water meter, quickly type in your address, and then enter the water reading. So, this would probably be a good candidate for a J2ME device.
Air traffic control? Definitely not something I'd want centrally managed from a cell phone.
So yes, A) and C) would be good.
As far as inventory control goes, I can see someone running around Walmart with a little scanner reading barcodes on products and typing in a quantity to keep track of what's on the shelves. I think that's a valid scenario too.
Kindest regards, and good luck on your studies!
-Cameron McKenzie