Take a look at the sentence again:
With a hotdog, Dris __________ Butler, her bulldog, to the car but could
not get him onto the backseat; Butler sensed a trip to the vet and refused
to budge.
The sentence requires the simple past of lead, an irregular verb. Led is the simple past form.
| Verb | Simple Present | Simple Past | Past Participle |
| lead | lead(s) | led | led |
Leaded, the form you chose, is a spelling error. Before you continue, review the rules for irregular verbs.
Try again to escape Grammar Hell!