Here is the item:
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 blank requires the simple past of lead, an irregular verb. You chose led, the correct form. Hallelujah!

Verb Simple
Present
Simple
Past
Past
Participle
lead lead(s) led led

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