Made it this time

All nine pictures I submitted from our family's trip to the zoo were accepted at Alamy. So, am I better at self editing or did I get a lucky QC pass?

One thing I will say is I had a lot of soft shots when viewing them at 1:1 pixels. Most of these shots looked great zoomed out at 50% - 75% but once I got to 100% they looked really soft. I'm trying to figure out the culprit. I was using my telephoto that doesn't have image stabilization and I didn't have a mono or tripod. I was often at focus lengths over 200mm with shutter speeds around 1/120th and the lighting was crappy and overcast. So, it it camera shake or soft lighting or a cheap non-stabilized lens?