Which of the definitions is the best for blocks as it is used in this sentence?

the peachtree road race in atlanta, ga is the world’s largest 10k, boasting 55,000 runners who line up for blocks at 7: 30am to run down atlanta’s most famous street.

the length of one side of a block, especially as a measure of distance.

A line can be measured. Lining up for blocks would mean people form a very long queue, which stretches over the distance of a few blocks.

a phrase is a set of word that make a sense, an expression formed by two or more words.

" teacher´s dictum on the possession of human "

" made a pile practicing "

" lived to an impressive age and dies "

a clause, in a grammar way is a series of words that have a complete meaning.

" was irritated by the persecution of those who called themselves "