[susan53]

Don't have time to deal with all these Ana Laura - will start with (A) and try and come back another time for others - though I'm sure other people will come in too.

A) Either would be OK here. There's not much difference. I might prefer limping if just one foot/leg were involved - ie my walk is normal when I put down one foot, but painful on the other. Hobble just has the general meaning of "walk with difficulty".
If you Google them they tend to be used fairly interchangeably - they both collocate with adverbs of manner like heavily/badly/painfully, and/or with a following adverbial :
Devin took off sprinting, and I was hobbling along behind him with my sore foot
When I was hobbling around on my crutches...
My dog was perfectly fine yesterday now today this morning he is limping around.. it's not difficult to imagine King Richard III limping along the cobblestone roads in terms of frequency though, there seem to be more examples of limp + adv of manner, and hobble + around/along etc.