Answer:
B. The senior enjoyed the ambulatory, wandering allowed on
her trip to Europe.
Step-by-step explanation:
Ambulatory definitions~
adjective
relating to or adapted for walking.
"continuous ambulatory dialysis"
noun
a place for walking, especially an aisle around the apse or a cloister in a church or monastery.
"the front arch of the old ambulatory"
By these definitions B. makes the most sense.
B. The senior enjoyed the ambulatory, wandering allowed on
her trip to Europe.