In which sentence does the subject agree with the verb?

The team of horses run across the prairie startling the sunbathing birds
A band of coyotes run, the fours next to the lake, occasionally coming to the shore for a drink
A herd of elephants move slowly across the savanna, the youngest, leaving between their legs of their mothers
The flock of sheep scurry down the path, nudged on by the border, collies running, besides them

GRAMMAR AND PUNCTUATION ONLINE PRACTICE

The flock of sheep scurry down the path, nudged on by the border, collies running, besides them

The subject agrees with the verb in the sentence: "The flock of sheep scurry down the path, nudged on by the border collies running beside them."