Am I being unreasonable? Honest question, no snark involved.

I have a little one in care, and she ignores me, which is my biggest pet peeve. I ask her questions, and she refuses to answer me or look at me. I try to place myself in her line of vision to get her attention, and call her repeatedly by her name, but she won't answer or acknowledge that I am speaking. She actually moves her eyes away when I get closer, and will continue to play or read or do whatever she's doing.

I ask her in a louder voice to please look at me, or to please come over here with me so we can talk about it, and she bursts into tears. This happens several times each day. I am not sure how to handle it. This morning it was over her snack. I asked her, "is your snack yummy?" and she stopped eating, and stared into the corner of my ceiling. I called her name, and she started to cry. I wasn't yelling or speaking in a harsh tone.

I try to get her to explain to me why she does this, and it seems like she doesn't know how to answer a why question. She's 33 months old, so closer to three than to one. I say, "why are you crying?" or "why do you get sad when Sally calls your name?", or "why don't you answer when I ask you things" and she doesn't seem to have the ability to word her answer correctly? I don't know.

Help?